EVALUATED PARAMETER REFERENCE

galaxy merger star formation 3d.

Browse the evaluated DIPL parameters for this pinned Arepo example. Values come from the bundled setup; a run using overrides can differ.

168 model parameters15 top-level groupsSource 351aa8111a32Explore 3D graph ↗Browse schemas ↗Try an override ↗

What this reference shows

Each entry gives the effective value, type, description, and relevant constraints. Open “Schema & provenance” for additional metadata and links to DIPL source files at the recorded lines.

PARAMETER GROUP

Build

67 parameters

build.analysis.fof

fof

EFFECTIVE VALUEfalse

Compile the friends-of-friends halo finder.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:382
Declaration: fof bool = false

build.analysis.fof.primary_link_type_mask

primary link type mask

EFFECTIVE VALUE2

Particle-type bit mask used as FoF primary linking tracers.

Try changing this parameter ↗

Type int64

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Validation condition: {.} >= 0

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:387
Declaration: primary_link_type_mask int = 2

build.analysis.fof.secondary_link_type_mask

secondary link type mask

EFFECTIVE VALUE0

Particle-type bit mask attached to nearest FoF primary tracers.

Try changing this parameter ↗

Type int64

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Validation condition: {.} >= 0

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:393
Declaration: secondary_link_type_mask int = 0

build.analysis.subfind

subfind

EFFECTIVE VALUEfalse

Compile the Subfind substructure finder; requires FoF.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Requires: build.analysis.fof

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:399
Declaration: subfind bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.analysis.subfind.calculate_velocity_dispersion

calculate velocity dispersion

EFFECTIVE VALUEfalse

Calculate additional Subfind velocity-dispersion information.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:410
Declaration: calculate_velocity_dispersion bool = false

build.analysis.subfind.extended_properties

extended properties

EFFECTIVE VALUEfalse

Calculate extended Subfind angular-momentum and energy properties.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:415
Declaration: extended_properties bool = false

build.analysis.subfind.save_density_estimates

save density estimates

EFFECTIVE VALUEfalse

Save Subfind smoothing lengths, densities, and velocity dispersions.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:405
Declaration: save_density_estimates bool = false

build.boundaries.x_mode

x mode

EFFECTIVE VALUE0

X-boundary mode; zero leaves no REFLECTIVE_X compile option.

Try changing this parameter ↗

Type int64

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Allowed options: 0, 1, 2

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:8
Declaration: x_mode int = 0

build.boundaries.y_mode

y mode

EFFECTIVE VALUE0

Y-boundary mode; zero leaves no REFLECTIVE_Y compile option.

Try changing this parameter ↗

Type int64

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Allowed options: 0, 1, 2

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:18
Declaration: y_mode int = 0

build.boundaries.z_mode

z mode

EFFECTIVE VALUE0

Z-boundary mode; zero leaves no REFLECTIVE_Z compile option.

Try changing this parameter ↗

Type int64

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Allowed options: 0, 1, 2

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:24
Declaration: z_mode int = 0

build.diagnostics.debug

debug

EFFECTIVE VALUEtrue

Enable Arepo debugging facilities and core-dump support.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:452
Declaration: debug bool = false
Modified at: profile.dip:39
Modification: debug = true

build.geometry.one_dimensional

one dimensional

EFFECTIVE VALUEfalse

Restrict the Voronoi mesh and hydrodynamics to one dimension.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:31
Declaration: one_dimensional bool = false

build.geometry.spherical_one_dimensional

spherical one dimensional

EFFECTIVE VALUEfalse

Use one-dimensional spherical geometry.

Try changing this parameter ↗

Type bool

Scientific impact Uses the first coordinate as radius under spherical symmetry.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Uses the first coordinate as radius under spherical symmetry.
Requires: build.geometry.one_dimensional

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:41
Declaration: spherical_one_dimensional bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.geometry.static_mesh

static mesh

EFFECTIVE VALUEfalse

Use a static Voronoi mesh.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Performance impact: Disables domain decomposition by default; mesh-generating points have zero velocity.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:49
Declaration: static_mesh bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.geometry.two_dimensional

two dimensional

EFFECTIVE VALUEfalse

Restrict the Voronoi mesh and hydrodynamics to two dimensions.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:36
Declaration: two_dimensional bool = false

build.gravity.cell_center_evaluation

cell center evaluation

EFFECTIVE VALUEtrue

Evaluate cell gravity at geometric centres; requires hierarchical gravity.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Requires: build.gravity.hierarchical

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:122
Declaration: cell_center_evaluation bool = false
Modified at: profile.dip:13
Modification: cell_center_evaluation = true

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.direct_summation

direct summation

EFFECTIVE VALUEtrue

Allow direct summation for small active particle sets.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Performance impact: Avoids tree-walk overhead for sufficiently small active particle sets.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:128
Declaration: direct_summation bool = false
Modified at: profile.dip:14
Modification: direct_summation = true

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.direct_summation.threshold

threshold

EFFECTIVE VALUE500

Active-particle threshold below which direct gravity summation is used.

Try changing this parameter ↗

Type int64

Validation {.} > 0

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Validation condition: {.} > 0
Recommended range: Positive; Arepo's documented default is 3000 active particles.
Performance impact: Increasing the threshold selects direct summation for more active-particle sets.
Requires: build.gravity.direct_summation

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:135
Declaration: threshold int = 3000
Modified at: profile.dip:15
Modification: threshold = 500

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.evaluate_potential

evaluate potential

EFFECTIVE VALUEfalse

Calculate gravitational potentials.

Try changing this parameter ↗

Type bool

Scientific impact Enables potential-energy diagnostics for global energy-conservation tests.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Enables potential-energy diagnostics for global energy-conservation tests.
Performance impact: Computes potential energy whenever global statistics are measured.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:221
Declaration: evaluate_potential bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.hierarchical

hierarchical

EFFECTIVE VALUEtrue

Use hierarchical gravity time integration.

Try changing this parameter ↗

Type bool

Scientific impact Uses hierarchical splitting of gravitational time integration.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Uses hierarchical splitting of gravitational time integration.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:115
Declaration: hierarchical bool = false
Modified at: profile.dip:12
Modification: hierarchical = true

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.individual_softening_type_mask

individual softening type mask

EFFECTIVE VALUE32

Particle-type bit mask selecting individual gravity softening.

Try changing this parameter ↗

Type int64

Scientific impact Assigns selected particle types a softening based on mass relative to type 1; primarily useful for zoom simulations.

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Validation condition: {.} >= 0
Scientific impact: Assigns selected particle types a softening based on mass relative to type 1; primarily useful for zoom simulations.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:154
Declaration: individual_softening_type_mask int = 0
Modified at: profile.dip:18
Modification: individual_softening_type_mask = 32

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.multiple_node_softening

multiple node softening

EFFECTIVE VALUEtrue

Retain component-specific softenings when using softened tree nodes.

Try changing this parameter ↗

Type bool

Scientific impact Approximates component centres of mass separately when evaluating softened node-particle interactions.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Approximates component centres of mass separately when evaluating softened node-particle interactions.
Performance impact: Can avoid a substantial tree-walk penalty from opening softened nodes, but stores component masses per tree node.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:145
Declaration: multiple_node_softening bool = false
Modified at: profile.dip:17
Modification: multiple_node_softening = true

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.non_periodic

non periodic

EFFECTIVE VALUEtrue

Compile non-periodic gravity.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:216
Declaration: non_periodic bool = false
Modified at: profile.dip:16
Modification: non_periodic = true

build.gravity.particle_mesh

particle mesh

EFFECTIVE VALUEfalse

Enable periodic particle-mesh gravity in the TreePM solver.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:163
Declaration: particle_mesh bool = false

build.gravity.particle_mesh.enlarge_high_resolution_region

enlarge high resolution region

EFFECTIVE VALUE0

Expansion factor for the TreePM high-resolution region.

Try changing this parameter ↗

Type float64

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Performance impact: A larger buffer reduces expensive high-resolution mesh-geometry recalculations for expanding particle sets.
Requires: build.gravity.particle_mesh.high_resolution_type_mask

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:193
Declaration: enlarge_high_resolution_region float = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.particle_mesh.grid_resolution

grid resolution

EFFECTIVE VALUE0

Particle-mesh cells per dimension; zero is disabled.

Try changing this parameter ↗

Type int64

Scientific impact Enables TreePM, using PM for long-range and the tree for short-range forces.

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Validation condition: {.} >= 0
Recommended range: At least 256 for TreePM accuracy; powers of two are fastest for FFTs.
Scientific impact: Enables TreePM, using PM for long-range and the tree for short-range forces.
Performance impact: Larger grids increase PM-force resolution, memory use, and FFT cost.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:166
Declaration: grid_resolution int = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.particle_mesh.high_resolution_grid_boost

high resolution grid boost

EFFECTIVE VALUE0

Resolution multiplier for a zoom TreePM grid.

Try changing this parameter ↗

Type int64

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Performance impact: Changes high-resolution FFT mesh size in proportion to PMGRID.
Requires: build.gravity.particle_mesh.high_resolution_type_mask

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:201
Declaration: high_resolution_grid_boost int = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.particle_mesh.high_resolution_type_mask

high resolution type mask

EFFECTIVE VALUE0

Particle-type mask defining the TreePM high-resolution region.

Try changing this parameter ↗

Type int64

Scientific impact Adds a high-resolution Fourier mesh around the selected particle types for zoom simulations.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Adds a high-resolution Fourier mesh around the selected particle types for zoom simulations.
Requires: build.gravity.particle_mesh.grid_resolution

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:185
Declaration: high_resolution_type_mask int = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.particle_mesh.short_range_cutoff

short range cutoff

EFFECTIVE VALUE4.5

TreePM short-range cutoff in particle-mesh cell units.

Try changing this parameter ↗

Type float64

Validation {.} > 0

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Validation condition: {.} > 0
Rationale: 4.5 mesh cells is Arepo's documented default.
Performance impact: Larger cutoffs extend the tree calculation further from each particle.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:176
Declaration: short_range_cutoff float = 4.5

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.particle_mesh.zoom_optimized

zoom optimized

EFFECTIVE VALUEfalse

Use the TreePM algorithm optimized for cosmological zoom simulations.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Performance impact: Uses a communication algorithm robust to clustered zoom data, but slower than the default for homogeneous periodic boxes.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:209
Declaration: zoom_optimized bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.self_gravity

self gravity

EFFECTIVE VALUEtrue

Compile gravitational interactions between particles and cells.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:110
Declaration: self_gravity bool = false
Modified at: profile.dip:11
Modification: self_gravity = true

build.gravity.softening_types

softening types

EFFECTIVE VALUE2

Number of available gravitational-softening families.

Try changing this parameter ↗

Type int64

Scientific impact Defines the available gravity-softening families that particle types may share.

Validation {.} >= 2

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Validation condition: {.} >= 2
Rationale: Defaults to Arepo's NTYPES (six in this source tree) when NSOFTTYPES is omitted; must match the configured SofteningComovingTypeN entries.
Scientific impact: Defines the available gravity-softening families that particle types may share.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:229
Declaration: softening_types int = 6
Modified at: profile.dip:19
Modification: softening_types = 2

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.initial_conditions.generate_gas_from_dark_matter

generate gas from dark matter

EFFECTIVE VALUEfalse

Generate gas particles from dark-matter-only initial conditions.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:314
Declaration: generate_gas_from_dark_matter bool = false

build.io.cpu_csv

cpu csv

EFFECTIVE VALUEfalse

Write the supplementary cpu.csv performance log.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:308
Declaration: cpu_csv bool = false

build.io.hdf5

hdf5

EFFECTIVE VALUEtrue

Compile HDF5 snapshot and initial-condition support.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:274
Declaration: hdf5 bool = false
Modified at: profile.dip:26
Modification: hdf5 = true

build.io.input_double_precision

input double precision

EFFECTIVE VALUEfalse

Read initial conditions in double precision.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:288
Declaration: input_double_precision bool = false

build.io.output_coordinates_double

output coordinates double

EFFECTIVE VALUEfalse

Always write coordinates in double precision.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:293
Declaration: output_coordinates_double bool = false

build.io.output_double_precision

output double precision

EFFECTIVE VALUEfalse

Write snapshot fields in double precision.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:298
Declaration: output_double_precision bool = false

build.io.read_mass_as_density

read mass as density

EFFECTIVE VALUEfalse

Interpret IC Mass fields as densities.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:303
Declaration: read_mass_as_density bool = false

build.io.reduced_flush

reduced flush

EFFECTIVE VALUEfalse

Reduce log-file flush frequency.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Performance impact: Reduces filesystem flush activity by avoiding flushes at every synchronization point.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:281
Declaration: reduced_flush bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.mesh.adaptive_hydro_softening

adaptive hydro softening

EFFECTIVE VALUEtrue

Compile adaptive gas-cell gravitational softening.

Try changing this parameter ↗

Type bool

Scientific impact Varies hydro-cell softening with cell radius using the runtime adaptive-softening table.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Varies hydro-cell softening with cell radius using the runtime adaptive-softening table.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:328
Declaration: adaptive_hydro_softening bool = false
Modified at: profile.dip:29
Modification: adaptive_hydro_softening = true

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.mesh.center_of_mass_drift

center of mass drift

EFFECTIVE VALUEtrue

Regularize mesh-generating-point drift from cell centres of mass.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:340
Declaration: center_of_mass_drift bool = false
Modified at: profile.dip:30
Modification: center_of_mass_drift = true

build.mesh.drift_limited_by_sound_speed

drift limited by sound speed

EFFECTIVE VALUEtrue

Limit centre-of-mass regularization by local sound speed.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Requires: build.mesh.center_of_mass_drift

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:345
Declaration: drift_limited_by_sound_speed bool = false
Modified at: profile.dip:31
Modification: drift_limited_by_sound_speed = true

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.mesh.face_angle_regularization

face angle regularization

EFFECTIVE VALUEtrue

Regularize mesh cells using their maximum face angle.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:335
Declaration: face_angle_regularization bool = false
Modified at: profile.dip:32
Modification: face_angle_regularization = true

build.mesh.no_refine_background_grid

no refine background grid

EFFECTIVE VALUEtrue

Exclude the background grid from refinement.

Try changing this parameter ↗

Type bool

Scientific impact Prevents derefinement of sufficiently large background cells in cosmological zoom simulations.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Prevents derefinement of sufficiently large background cells in cosmological zoom simulations.
Requires: build.mesh.refinement

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:359
Declaration: no_refine_background_grid bool = false
Modified at: profile.dip:34
Modification: no_refine_background_grid = true

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.mesh.override_peanogrid_warning

override peanogrid warning

EFFECTIVE VALUEtrue

Allow configurations that exceed the Peano-grid warning threshold.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:367
Declaration: override_peanogrid_warning bool = false
Modified at: profile.dip:35
Modification: override_peanogrid_warning = true

build.mesh.refinement

refinement

EFFECTIVE VALUEtrue

Compile cell refinement and derefinement.

Try changing this parameter ↗

Type bool

Scientific impact Enables dynamic cell refinement and derefinement; the default target is gas-cell mass.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Enables dynamic cell refinement and derefinement; the default target is gas-cell mass.
Conflicts with: build.geometry.one_dimensional

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:320
Declaration: refinement bool = false
Modified at: profile.dip:28
Modification: refinement = true

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.mesh.volume_refinement

volume refinement

EFFECTIVE VALUEtrue

Compile volume-limited mesh refinement.

Try changing this parameter ↗

Type bool

Scientific impact Enforces absolute cell-volume bounds and a maximum neighbouring-cell volume contrast.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Enforces absolute cell-volume bounds and a maximum neighbouring-cell volume contrast.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:352
Declaration: volume_refinement bool = false
Modified at: profile.dip:33
Modification: volume_refinement = true

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.numerics.riemann_hlld

riemann hlld

EFFECTIVE VALUEfalse

Use the HLLD Riemann solver for ideal MHD.

Try changing this parameter ↗

Type bool

Scientific impact Selects the HLLD approximate Riemann solver required for MHD.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Selects the HLLD approximate Riemann solver required for MHD.
Requires: build.physics.magnetohydrodynamics

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:373
Declaration: riemann_hlld bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.output.acceleration

acceleration

EFFECTIVE VALUEfalse

Write gravitational accelerations.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:436
Declaration: acceleration bool = false

build.output.center_of_mass

center of mass

EFFECTIVE VALUEfalse

Write gas-cell centres of mass.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:426
Declaration: center_of_mass bool = false

build.output.magnetic_field_gradient

magnetic field gradient

EFFECTIVE VALUEfalse

Write magnetic-field gradients.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:431
Declaration: magnetic_field_gradient bool = false

build.output.potential

potential

EFFECTIVE VALUEfalse

Write gravitational potentials.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:446
Declaration: potential bool = false

build.output.pressure_gradient

pressure gradient

EFFECTIVE VALUEfalse

Write pressure gradients.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:441
Declaration: pressure_gradient bool = false

build.output.process_schedule_exactly

process schedule exactly

EFFECTIVE VALUEtrue

Process output-list times before starting to improve timing accuracy.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:421
Declaration: process_schedule_exactly bool = false
Modified at: profile.dip:37
Modification: process_schedule_exactly = true

build.physics.adiabatic_index

adiabatic index

EFFECTIVE VALUE0

Compile-time gas adiabatic index; zero selects Arepo's default.

Try changing this parameter ↗

Type float64

Scientific impact Sets the equation-of-state adiabatic index for ideal hydrodynamics.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Rationale: A value of zero delegates to Arepo's ideal-hydrodynamics default of 5/3.
Scientific impact: Sets the equation-of-state adiabatic index for ideal hydrodynamics.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:101
Declaration: adiabatic_index float = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.physics.cooling

cooling

EFFECTIVE VALUEtrue

Compile radiative cooling and UV-background support.

Try changing this parameter ↗

Type bool

Scientific impact Enables primordial cooling physics and conversions to proper cgs quantities.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Enables primordial cooling physics and conversions to proper cgs quantities.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:57
Declaration: cooling bool = false
Modified at: profile.dip:7
Modification: cooling = true

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.physics.jeans_cell_stability

jeans cell stability

EFFECTIVE VALUEtrue

Enforce the Jeans-stability temperature floor for gas cells.

Try changing this parameter ↗

Type bool

Scientific impact Imposes an adaptive temperature floor intended to keep the Jeans length resolved.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Imposes an adaptive temperature floor intended to keep the Jeans length resolved.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:71
Declaration: jeans_cell_stability bool = false
Modified at: profile.dip:9
Modification: jeans_cell_stability = true

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.physics.magnetohydrodynamics

magnetohydrodynamics

EFFECTIVE VALUEfalse

Compile ideal magnetohydrodynamics.

Try changing this parameter ↗

Type bool

Scientific impact Evolves ideal MHD; a zero initial magnetic field remains zero under the ideal-MHD equations.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Evolves ideal MHD; a zero initial magnetic field remains zero under the ideal-MHD equations.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:78
Declaration: magnetohydrodynamics bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.physics.magnetohydrodynamics.powell_cleaning

powell cleaning

EFFECTIVE VALUEfalse

Use Powell eight-wave divergence-control terms for MHD.

Try changing this parameter ↗

Type bool

Scientific impact Adds Powell eight-wave divergence-control terms to the MHD equations.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Adds Powell eight-wave divergence-control terms to the MHD equations.
Requires: build.physics.magnetohydrodynamics

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:85
Declaration: powell_cleaning bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.physics.magnetohydrodynamics.powell_limit_timestep

powell limit timestep

EFFECTIVE VALUEfalse

Limit timesteps for Powell divergence-control stability.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Performance impact: Adds a timestep constraint required by Powell divergence control.
Requires: build.physics.magnetohydrodynamics

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:93
Declaration: powell_limit_timestep bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.physics.star_formation

star formation

EFFECTIVE VALUEtrue

Compile the Springel-Hernquist multiphase star-formation model.

Try changing this parameter ↗

Type bool

Scientific impact Turns eligible dense gas into collisionless star particles using the Springel-Hernquist (2003) model.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Turns eligible dense gas into collisionless star particles using the Springel-Hernquist (2003) model.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:64
Declaration: star_formation bool = false
Modified at: profile.dip:8
Modification: star_formation = true

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.precision.fftw_double

fftw double

EFFECTIVE VALUEfalse

Use double-precision FFTW transforms.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:263
Declaration: fftw_double bool = false

build.precision.mode

mode

EFFECTIVE VALUE1

Arepo precision mode; zero leaves DOUBLEPRECISION unspecified.

Try changing this parameter ↗

Type int64

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Allowed options: 0, 1, 2, 3

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:252
Declaration: mode int = 0
Modified at: profile.dip:23
Modification: mode = 1

build.precision.neighbor_tree_double

neighbor tree double

EFFECTIVE VALUEtrue

Use double precision for neighbor-tree node extensions.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:268
Declaration: neighbor_tree_double bool = false
Modified at: profile.dip:24
Modification: neighbor_tree_double = true

build.time.force_equal_timesteps

force equal timesteps

EFFECTIVE VALUEfalse

Force all particles/cells onto equal timesteps.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Performance impact: Can increase computational work by preventing individual adaptive timesteps.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:239
Declaration: force_equal_timesteps bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.time.tree_based_timesteps

tree based timesteps

EFFECTIVE VALUEtrue

Use the non-local, tree-based timestep criterion.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/build.dip:246
Declaration: tree_based_timesteps bool = false
Modified at: profile.dip:21
Modification: tree_based_timesteps = true

PARAMETER GROUP

Code Units

3 parameters

code_units.length

length

EFFECTIVE VALUE3.086e21

One Arepo length unit (one kiloparsec).

Try changing this parameter ↗

Type float64Units cm

Schema & provenance

Model metadata

Tags: arepo:param
Rationale: Arepo interprets its native length unit in cm/h.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/cosmological_units.dip:5
Declaration: length float = 3.085678e21 cm

Notes

Author guidance (advisory; not enforced by these metadata fields):

code_units.mass

mass

EFFECTIVE VALUE1.989e43

One Arepo mass unit (10^10 solar masses).

Try changing this parameter ↗

Type float64Units g

Schema & provenance

Model metadata

Tags: arepo:param
Rationale: Arepo interprets its native mass unit in g/h.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/cosmological_units.dip:12
Declaration: mass float = 1.989e43 g

Notes

Author guidance (advisory; not enforced by these metadata fields):

code_units.velocity

velocity

EFFECTIVE VALUE1e5

One Arepo velocity unit (one kilometre per second).

Try changing this parameter ↗

Type float64Units cm*s-1

Schema & provenance

Model metadata

Tags: arepo:param
Rationale: Together with the length and mass bases, this determines Arepo's internal time unit.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/cosmological_units.dip:19
Declaration: velocity float = 1e5 cm/s

Notes

Author guidance (advisory; not enforced by these metadata fields):

PARAMETER GROUP

Cooling

1 parameters

cooling.uv_background_file

uv background file

EFFECTIVE VALUE"./TREECOOL_ep"

Cooling and UV-background table used by Arepo.

Try changing this parameter ↗

Type str

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: cooling_settings
Supplied by schema: cooling_settings
Used by: datasets.uv_background.output_file
Requires: build.physics.cooling

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/cooling.dip:5
Declaration: uv_background_file str
Modified at: profile.dip:109
Modification: uv_background_file = "./TREECOOL_ep"

Notes

Author guidance (advisory; not enforced by these metadata fields):

PARAMETER GROUP

Cosmology

7 parameters

cosmology.baryon_density

baryon density

EFFECTIVE VALUE0

Present-day baryon density parameter, OmegaBaryon.

Try changing this parameter ↗

Type float64

Scientific impact Defines the z=0 baryon density relative to critical density for comoving integration, halo/subhalo finding, and star formation.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: cosmology_settings
Supplied by schema: cosmology_settings
Scientific impact: Defines the z=0 baryon density relative to critical density for comoving integration, halo/subhalo finding, and star formation.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/cosmology.dip:12
Declaration: baryon_density float
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:46
Modification: baryon_density = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

cosmology.dark_energy_density

dark energy density

EFFECTIVE VALUE0

Present-day dark-energy density parameter, OmegaLambda.

Try changing this parameter ↗

Type float64

Scientific impact Defines the z=0 vacuum-energy density relative to critical density for comoving integration and halo/subhalo finding.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: cosmology_settings
Supplied by schema: cosmology_settings
Rationale: Often derived from the remaining density budget of a flat cosmology.
Scientific impact: Defines the z=0 vacuum-energy density relative to critical density for comoving integration and halo/subhalo finding.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/cosmology.dip:33
Declaration: dark_energy_density float
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:50
Modification: dark_energy_density float = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

cosmology.dark_matter_density

dark matter density

EFFECTIVE VALUE0

Present-day non-baryonic matter density derived from total and baryon density.

Try changing this parameter ↗

Type float64

Scientific impact Represents the non-baryonic matter component implied by the total and baryon density parameters.

Schema & provenance

Model metadata

Applied schemas: cosmology_settings
Supplied by schema: cosmology_settings
Scientific impact: Represents the non-baryonic matter component implied by the total and baryon density parameters.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/cosmology.dip:41
Declaration: dark_matter_density float
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:51
Modification: dark_matter_density float = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

cosmology.final_redshift

final redshift

EFFECTIVE VALUE0

Final redshift from which the scale-factor end time is derived.

Try changing this parameter ↗

Type float64

Schema & provenance

Model metadata

Applied schemas: cosmology_settings
Supplied by schema: cosmology_settings
Reads during evaluation: ?simulation.time.final_redshift

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/cosmology.dip:30
Declaration: final_redshift float
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:49
Modification: final_redshift = {?simulation.time.final_redshift}

cosmology.hubble_parameter

hubble parameter

EFFECTIVE VALUE0.6774

Dimensionless Hubble parameter h, written to HubbleParam.

Try changing this parameter ↗

Type float64

Scientific impact Sets the z=0 Hubble constant in units of 100 km s^-1 Mpc^-1 for physics that converts to proper cgs units.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: cosmology_settings
Supplied by schema: cosmology_settings
Rationale: For gravity and adiabatic gas dynamics Arepo absorbs h into its code units; use 1.0 unless conversions to proper cgs units, such as radiative cooling, are required.
Scientific impact: Sets the z=0 Hubble constant in units of 100 km s^-1 Mpc^-1 for physics that converts to proper cgs units.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/cosmology.dip:19
Declaration: hubble_parameter float
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:47
Modification: hubble_parameter = 1
Modified at: profile.dip:65
Modification: hubble_parameter = 0.6774

Notes

Author guidance (advisory; not enforced by these metadata fields):

cosmology.initial_redshift

initial redshift

EFFECTIVE VALUE0

Initial redshift from which the scale-factor start time is derived.

Try changing this parameter ↗

Type float64

Schema & provenance

Model metadata

Applied schemas: cosmology_settings
Supplied by schema: cosmology_settings
Reads during evaluation: ?simulation.time.initial_redshift

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/cosmology.dip:27
Declaration: initial_redshift float
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:48
Modification: initial_redshift = {?simulation.time.initial_redshift}

cosmology.matter_density

matter density

EFFECTIVE VALUE0

Present-day total matter density parameter, Omega0.

Try changing this parameter ↗

Type float64

Scientific impact Defines the z=0 matter density relative to critical density for comoving integration and halo/subhalo finding.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: cosmology_settings
Supplied by schema: cosmology_settings
Scientific impact: Defines the z=0 matter density relative to critical density for comoving integration and halo/subhalo finding.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/cosmology.dip:5
Declaration: matter_density float
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:45
Modification: matter_density = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

PARAMETER GROUP

Datasets

15 parameters

datasets.sfr_reduced_ref.data.cumulative_stellar_mass

cumulative stellar mass

EFFECTIVE VALUE

[0, 4.553e-3, 0.01584, 0.02658, 0.03789, 0.05058, 0.06005, 0.06962, 0.07977, 0.0908, 0.1002, 0.1093, 0.1188, 0.1283, 0.1373, 0.1465, 0.1554, 0.1636, 0.1703, 0.176, 0.1817, 0.1896, 0.1954, 0.2013, 0.2065, 0.2126, 0.2182, 0.2242, 0.2285, 0.2314, 0.2341, 0.238, 0.2406, 0.2442, 0.2492, 0.2547, 0.2603, 0.2638, 0.2672, 0.2706, 0.2756, 0.2799, 0.2818, 0.2852, 0.2896, 0.2944, 0.297, 0.3004, 0.303, 0.3073, 0.3101, 0.3138, 0.3175, 0.3208, 0.3232, 0.3255, 0.3279, 0.3313, 0.3342, 0.3365, 0.338, 0.3398, 0.3422, 0.3448, 0.3463, 0.3477, 0.3497, 0.3512, 0.3525, 0.3553, 0.3579, 0.3617, 0.3644, 0.3705, 0.3759, 0.3785, 0.3821, 0.386, 0.3896, 0.395, 0.3987, 0.4029, 0.4073, 0.4116, 0.4167, 0.4211, 0.4252, 0.4295, 0.435, 0.4391, 0.4429, 0.4462, 0.4501, 0.4537, 0.458, 0.4609, 0.4643, 0.4681, 0.4722, 0.4766, 0.4807, 0.4838, 0.4886, 0.4917, 0.4955, 0.4991, 0.5017, 0.5048, 0.5073, 0.5104, 0.5123, 0.5153, 0.5174, 0.5204]

Try changing this parameter ↗

Type float64Shape 114

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:6
Declaration: cumulative_stellar_mass float

datasets.sfr_reduced_ref.data.expected_stellar_mass

expected stellar mass

EFFECTIVE VALUE

[0, 4.121e-4, 4.275e-4, 4.881e-4, 2.598e-6, 2.167e-6, 2.821e-6, 4.583e-6, 5.14e-6, 3.307e-6, 3.026e-6, 1.817e-6, 4.065e-6, 1.699e-6, 2.211e-6, 3.017e-6, 2.981e-6, 1.592e-6, 1.153e-6, 1.473e-6, 3.338e-6, 1.681e-6, 2.718e-6, 2.712e-6, 1.314e-6, 2.878e-6, 2.324e-6, 2.168e-4, 0, 0, 1.52e-6, 2.256e-4, 5.418e-6, 2.209e-4, 0, 2.174e-4, 1.831e-4, 1.119e-6, 1.694e-4, 5.984e-7, 9.512e-7, 1.659e-4, 1.635e-4, 1.7e-6, 1.44e-6, 1.496e-4, 1.506e-4, 1.44e-4, 1.344e-4, 1.488e-4, 1.453e-7, 6.69e-7, 1.189e-6, 1.967e-6, 0, 1.257e-4, 6.659e-7, 1.144e-4, 1.141e-4, 0, 2.718e-7, 7.593e-5, 1.631e-4, 0, 0, 0, 6.968e-6, 7.995e-6, 1.523e-5, 0, 2.45e-4, 0, 1.85e-6, 1.554e-7, 0, 0, 0, 2.013e-4, 1.714e-4, 3.614e-4, 3.437e-5, 0, 3.288e-4, 2.827e-4, 7.092e-5, 3.208e-4, 0, 8.087e-5, 2.981e-4, 0, 0, 2.453e-4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2.295e-4, 0, 0, 0, 4.161e-5, 0, 0, 0, 0, 0, 0]

Try changing this parameter ↗

Type float64Shape 114

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:2
Declaration: expected_stellar_mass float

datasets.sfr_reduced_ref.data.formed_stellar_mass

formed stellar mass

EFFECTIVE VALUE

[0, 3.312e-4, 8.786e-4, 4.881e-4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9.762e-5, 0, 0, 0, 9.762e-5, 0, 9.762e-5, 0, 9.762e-5, 9.762e-5, 0, 9.762e-5, 0, 0, 2.929e-4, 9.762e-5, 0, 0, 1.952e-4, 0, 9.762e-5, 9.762e-5, 1.952e-4, 0, 0, 0, 0, 0, 9.762e-5, 0, 0, 9.762e-5, 0, 0, 9.762e-5, 1.952e-4, 0, 0, 0, 0, 0, 0, 0, 2.929e-4, 0, 0, 0, 0, 0, 0, 9.762e-5, 2.929e-4, 0, 0, 0, 2.929e-4, 4.881e-4, 0, 6.833e-4, 0, 9.762e-5, 4.881e-4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1.952e-4, 0, 0, 0, 0, 0, 0]

Try changing this parameter ↗

Type float64Shape 114

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:5
Declaration: formed_stellar_mass float

datasets.sfr_reduced_ref.data.instantaneous_sfr

instantaneous sfr

EFFECTIVE VALUE

[6.688, 3.609, 2.998, 3.45, 3.524, 3.16, 3.296, 3.04, 3.021, 2.814, 2.67, 2.667, 2.591, 2.451, 2.41, 2.304, 2.198, 2.017, 1.999, 2.009, 2.09, 1.957, 1.767, 1.746, 1.83, 1.715, 1.578, 1.522, 1.638, 1.701, 1.654, 1.601, 1.627, 1.616, 1.81, 1.54, 1.295, 1.235, 1.193, 1.152, 1.192, 1.167, 1.148, 1.18, 1.11, 1.054, 1.062, 1.009, 0.9479, 1.047, 0.9722, 0.9041, 0.8807, 0.8606, 0.8783, 0.8811, 0.8094, 0.8129, 0.7972, 0.7914, 0.8016, 1.091, 1.724, 1.279, 0.9164, 0.8196, 0.9148, 0.9895, 1.217, 1.687, 1.773, 1.847, 2.699, 4.162, 2.626, 1.723, 1.481, 1.496, 2.42, 3.061, 2.065, 2.796, 2.797, 2.56, 2.6, 2.797, 2.677, 2.62, 2.528, 2.369, 2.384, 2.163, 2.272, 2.292, 2.266, 2.228, 2.415, 2.253, 2.229, 2.317, 2.486, 2.147, 2.096, 1.927, 1.958, 1.846, 1.626, 1.576, 1.613, 1.46, 1.598, 1.481, 1.432, 1.586]

Try changing this parameter ↗

Type float64Shape 114

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:3
Declaration: instantaneous_sfr float

datasets.sfr_reduced_ref.data.realized_sfr

realized sfr

EFFECTIVE VALUE

[0, 11.51, 5.969, 6.815, 0.03627, 0.03025, 0.03939, 0.06399, 0.07177, 0.04618, 0.04226, 0.02537, 0.05677, 0.02373, 0.03087, 0.04212, 0.04163, 0.02223, 0.01611, 0.02057, 0.04661, 0.02348, 0.03796, 0.03787, 0.01835, 0.04019, 0.03245, 3.027, 0, 0, 0.04246, 6.299, 0.1513, 6.17, 0, 3.035, 2.557, 0.01563, 2.365, 8.355e-3, 0.01328, 2.317, 2.282, 0.02373, 0.0201, 2.089, 2.104, 2.01, 1.876, 2.078, 2.029e-3, 9.341e-3, 0.0166, 0.02746, 0, 1.756, 9.299e-3, 1.598, 1.594, 0, 7.59e-3, 2.121, 4.555, 0, 0, 0, 0.1946, 0.2233, 0.2127, 0, 6.842, 0, 0.05168, 4.34e-3, 0, 0, 0, 5.622, 4.786, 10.09, 0.9598, 0, 9.183, 7.894, 1.981, 8.96, 0, 2.258, 8.325, 0, 0, 6.849, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6.409, 0, 0, 0, 1.162, 0, 0, 0, 0, 0, 0]

Try changing this parameter ↗

Type float64Shape 114

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:4
Declaration: realized_sfr float

datasets.sfr_reduced_ref.data.time_coordinate

time coordinate

EFFECTIVE VALUE

[0, 0.01172, 0.04248, 0.0791, 0.115, 0.1516, 0.1882, 0.2249, 0.2615, 0.2981, 0.3347, 0.3713, 0.408, 0.4446, 0.4812, 0.5178, 0.5544, 0.5911, 0.6277, 0.6643, 0.7009, 0.7375, 0.7742, 0.8108, 0.8474, 0.884, 0.9207, 0.9565, 0.9862, 1.007, 1.026, 1.044, 1.063, 1.081, 1.112, 1.147, 1.182, 1.214, 1.248, 1.282, 1.318, 1.352, 1.384, 1.417, 1.454, 1.488, 1.521, 1.556, 1.591, 1.626, 1.662, 1.698, 1.735, 1.772, 1.808, 1.844, 1.88, 1.916, 1.951, 1.972, 1.99, 2.008, 2.026, 2.044, 2.062, 2.081, 2.101, 2.12, 2.139, 2.158, 2.177, 2.196, 2.214, 2.231, 2.248, 2.266, 2.286, 2.304, 2.323, 2.341, 2.359, 2.384, 2.402, 2.421, 2.443, 2.461, 2.48, 2.498, 2.517, 2.535, 2.554, 2.572, 2.592, 2.61, 2.628, 2.647, 2.665, 2.683, 2.702, 2.72, 2.738, 2.756, 2.775, 2.793, 2.812, 2.83, 2.849, 2.869, 2.888, 2.906, 2.924, 2.943, 2.962, 2.981]

Try changing this parameter ↗

Type float64Shape 114

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:1
Declaration: time_coordinate float

datasets.sfr_reduced_ref.output_file

output file

EFFECTIVE VALUE"sfr_reduced_ref.txt"

Try changing this parameter ↗

Type str

Schema & provenance

Model metadata

Tags: arepo:dataset

Source history

Declared at: tables.dip:3
Declaration: output_file str = "sfr_reduced_ref.txt"

datasets.uv_background.data.heating_HI

heating HI

EFFECTIVE VALUE

[3.653e-25, 4.077e-25, 4.525e-25, 5.007e-25, 5.539e-25, 6.112e-25, 6.745e-25, 7.435e-25, 8.193e-25, 9.007e-25, 9.901e-25, 1.086e-24, 1.191e-24, 1.303e-24, 1.425e-24, 1.552e-24, 1.691e-24, 1.838e-24, 1.998e-24, 2.168e-24, 2.352e-24, 2.539e-24, 2.74e-24, 2.951e-24, 3.177e-24, 3.404e-24, 3.646e-24, 3.882e-24, 4.133e-24, 4.385e-24, 4.651e-24, 4.905e-24, 5.171e-24, 5.427e-24, 5.693e-24, 5.926e-24, 6.166e-24, 6.369e-24, 6.619e-24, 6.741e-24, 6.907e-24, 7.04e-24, 7.172e-24, 7.257e-24, 7.337e-24, 7.369e-24, 7.439e-24, 7.344e-24, 7.342e-24, 7.266e-24, 7.171e-24, 7.141e-24, 7.107e-24, 6.696e-24, 6.804e-24, 6.604e-24, 6.378e-24, 6.156e-24, 5.917e-24, 5.713e-24, 5.506e-24, 5.318e-24, 5.128e-24, 4.968e-24, 4.818e-24, 4.684e-24, 4.559e-24, 4.462e-24, 4.376e-24, 4.312e-24, 4.255e-24, 4.227e-24, 4.209e-24, 4.22e-24, 4.237e-24, 4.254e-24, 4.271e-24, 4.25e-24, 4.216e-24, 3.922e-24, 3.422e-24, 3.306e-25, 3.29e-26, 1.574e-26, 7.33e-27, 4.554e-27, 2.918e-27, 2.193e-27, 1.679e-27, 1.368e-27, 1.115e-27, 9.39e-28, 7.931e-28, 6.839e-28, 5.865e-28, 5.092e-28, 4.437e-28, 3.899e-28, 3.432e-28, 3.03e-28, 2.677e-28, 2.384e-28, 2.127e-28, 1.888e-28, 1.678e-28, 1.492e-28, 1.327e-28, 1.187e-28, 1.063e-28, 9.484e-29, 8.465e-29, 7.631e-29, 6.938e-29, 6.422e-29, 6.128e-29, 6.053e-29, 1.919e-29]

Try changing this parameter ↗

Type float64Shape 117

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:5
Declaration: heating_HI float

datasets.uv_background.data.heating_HeI

heating HeI

EFFECTIVE VALUE

[3.989e-25, 4.446e-25, 4.928e-25, 5.455e-25, 6.038e-25, 6.672e-25, 7.373e-25, 8.138e-25, 8.982e-25, 9.887e-25, 1.088e-24, 1.195e-24, 1.312e-24, 1.437e-24, 1.573e-24, 1.722e-24, 1.884e-24, 2.047e-24, 2.223e-24, 2.409e-24, 2.61e-24, 2.82e-24, 3.046e-24, 3.28e-24, 3.531e-24, 3.782e-24, 4.049e-24, 4.317e-24, 4.601e-24, 4.877e-24, 5.168e-24, 5.446e-24, 5.737e-24, 6.001e-24, 6.275e-24, 6.509e-24, 6.749e-24, 6.945e-24, 7.189e-24, 7.284e-24, 7.425e-24, 7.511e-24, 7.594e-24, 7.615e-24, 7.629e-24, 7.58e-24, 7.569e-24, 7.359e-24, 7.244e-24, 7.028e-24, 6.798e-24, 6.596e-24, 6.394e-24, 5.827e-24, 5.725e-24, 5.347e-24, 4.97e-24, 4.691e-24, 4.411e-24, 4.202e-24, 3.997e-24, 3.836e-24, 3.676e-24, 3.536e-24, 3.405e-24, 3.311e-24, 3.224e-24, 3.164e-24, 3.111e-24, 3.078e-24, 3.05e-24, 3.049e-24, 3.055e-24, 3.074e-24, 3.099e-24, 3.135e-24, 3.172e-24, 3.164e-24, 3.145e-24, 2.885e-24, 2.509e-24, 3.699e-25, 5.625e-26, 2.724e-26, 1.271e-26, 7.892e-27, 5.052e-27, 3.776e-27, 2.874e-27, 2.335e-27, 1.897e-27, 1.594e-27, 1.343e-27, 1.159e-27, 9.937e-28, 8.646e-28, 7.549e-28, 6.647e-28, 5.862e-28, 5.19e-28, 4.598e-28, 4.103e-28, 3.667e-28, 3.262e-28, 2.906e-28, 2.587e-28, 2.303e-28, 2.056e-28, 1.839e-28, 1.642e-28, 1.468e-28, 1.323e-28, 1.203e-28, 1.111e-28, 1.058e-28, 1.046e-28, 3.32e-29]

Try changing this parameter ↗

Type float64Shape 117

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:6
Declaration: heating_HeI float

datasets.uv_background.data.heating_HeII

heating HeII

EFFECTIVE VALUE

[3.333e-26, 3.673e-26, 4.026e-26, 4.41e-26, 4.83e-26, 5.284e-26, 5.779e-26, 6.31e-26, 6.889e-26, 7.506e-26, 8.178e-26, 8.889e-26, 9.66e-26, 1.049e-25, 1.138e-25, 1.231e-25, 1.332e-25, 1.437e-25, 1.551e-25, 1.666e-25, 1.789e-25, 1.921e-25, 2.063e-25, 2.197e-25, 2.338e-25, 2.487e-25, 2.646e-25, 2.796e-25, 2.954e-25, 3.097e-25, 3.246e-25, 3.382e-25, 3.523e-25, 3.644e-25, 3.768e-25, 3.85e-25, 3.932e-25, 3.96e-25, 4.01e-25, 3.963e-25, 3.939e-25, 3.86e-25, 3.78e-25, 3.659e-25, 3.538e-25, 3.376e-25, 3.236e-25, 2.989e-25, 2.793e-25, 2.538e-25, 2.296e-25, 2.02e-25, 1.77e-25, 1.381e-25, 1.157e-25, 8.123e-26, 5.652e-26, 3.794e-26, 2.54e-26, 1.896e-26, 1.42e-26, 1.162e-26, 9.537e-27, 8.078e-27, 6.857e-27, 5.891e-27, 5.069e-27, 4.39e-27, 3.81e-27, 3.314e-27, 2.885e-27, 2.492e-27, 2.156e-27, 1.862e-27, 1.61e-27, 1.387e-27, 1.195e-27, 1.026e-27, 8.792e-28, 7.498e-28, 6.369e-28, 5.396e-28, 4.782e-28, 3.514e-28, 2.392e-28, 1.634e-28, 1.139e-28, 8.048e-29, 5.765e-29, 4.147e-29, 2.976e-29, 2.128e-29, 1.524e-29, 1.09e-29, 7.743e-30, 5.532e-30, 3.966e-30, 2.886e-30, 2.104e-30, 1.566e-30, 1.167e-30, 9.012e-31, 6.982e-31, 5.54e-31, 4.409e-31, 3.589e-31, 2.924e-31, 2.426e-31, 2.019e-31, 1.688e-31, 1.412e-31, 1.186e-31, 1.005e-31, 8.588e-32, 7.557e-32, 6.695e-32, 1.914e-32]

Try changing this parameter ↗

Type float64Shape 117

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:7
Declaration: heating_HeII float

datasets.uv_background.data.ionization_HI

ionization HI

EFFECTIVE VALUE

[6.06e-14, 6.721e-14, 7.443e-14, 8.229e-14, 9.097e-14, 1.001e-13, 1.102e-13, 1.217e-13, 1.343e-13, 1.473e-13, 1.614e-13, 1.772e-13, 1.946e-13, 2.124e-13, 2.318e-13, 2.529e-13, 2.76e-13, 2.996e-13, 3.253e-13, 3.528e-13, 3.827e-13, 4.127e-13, 4.452e-13, 4.792e-13, 5.158e-13, 5.523e-13, 5.915e-13, 6.311e-13, 6.734e-13, 7.147e-13, 7.584e-13, 8.004e-13, 8.447e-13, 8.864e-13, 9.302e-13, 9.692e-13, 1.01e-12, 1.045e-12, 1.082e-12, 1.112e-12, 1.144e-12, 1.164e-12, 1.186e-12, 1.201e-12, 1.218e-12, 1.223e-12, 1.23e-12, 1.23e-12, 1.231e-12, 1.227e-12, 1.223e-12, 1.209e-12, 1.195e-12, 1.17e-12, 1.146e-12, 1.121e-12, 1.097e-12, 1.073e-12, 1.05e-12, 1.026e-12, 1.001e-12, 9.768e-13, 9.524e-13, 9.295e-13, 9.064e-13, 8.853e-13, 8.641e-13, 8.457e-13, 8.273e-13, 8.121e-13, 7.971e-13, 7.851e-13, 7.733e-13, 7.648e-13, 7.567e-13, 7.489e-13, 7.415e-13, 7.293e-13, 7.174e-13, 6.65e-13, 6.091e-13, 4.136e-14, 1.757e-15, 4.699e-16, 2.123e-16, 1.332e-16, 9.614e-17, 7.538e-17, 6.168e-17, 5.22e-17, 4.5e-17, 3.934e-17, 3.476e-17, 3.086e-17, 2.754e-17, 2.466e-17, 2.214e-17, 1.992e-17, 1.792e-17, 1.612e-17, 1.448e-17, 1.303e-17, 1.171e-17, 1.032e-17, 9.024e-18, 7.869e-18, 6.788e-18, 5.824e-18, 4.925e-18, 3.992e-18, 3.119e-18, 2.353e-18, 1.657e-18, 1.071e-18, 5.752e-19, 2.082e-19, 1.8e-23]

Try changing this parameter ↗

Type float64Shape 117

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:2
Declaration: ionization_HI float

datasets.uv_background.data.ionization_HeI

ionization HeI

EFFECTIVE VALUE

[3.03e-14, 3.381e-14, 3.766e-14, 4.18e-14, 4.639e-14, 5.138e-14, 5.692e-14, 6.292e-14, 6.956e-14, 7.672e-14, 8.461e-14, 9.303e-14, 1.023e-13, 1.123e-13, 1.234e-13, 1.344e-13, 1.465e-13, 1.599e-13, 1.746e-13, 1.896e-13, 2.058e-13, 2.223e-13, 2.401e-13, 2.585e-13, 2.783e-13, 2.988e-13, 3.207e-13, 3.422e-13, 3.652e-13, 3.872e-13, 4.107e-13, 4.333e-13, 4.572e-13, 4.796e-13, 5.03e-13, 5.23e-13, 5.437e-13, 5.614e-13, 5.796e-13, 5.934e-13, 6.074e-13, 6.168e-13, 6.263e-13, 6.317e-13, 6.372e-13, 6.371e-13, 6.37e-13, 6.318e-13, 6.267e-13, 6.164e-13, 6.062e-13, 5.912e-13, 5.765e-13, 5.583e-13, 5.406e-13, 5.218e-13, 5.037e-13, 4.879e-13, 4.728e-13, 4.593e-13, 4.46e-13, 4.342e-13, 4.225e-13, 4.129e-13, 4.032e-13, 3.951e-13, 3.87e-13, 3.812e-13, 3.753e-13, 3.718e-13, 3.683e-13, 3.669e-13, 3.655e-13, 3.657e-13, 3.661e-13, 3.666e-13, 3.672e-13, 3.629e-13, 3.587e-13, 3.281e-13, 2.966e-13, 3.157e-14, 2.648e-15, 7.948e-16, 3.532e-16, 2.175e-16, 1.544e-16, 1.196e-16, 9.675e-17, 8.112e-17, 6.939e-17, 6.024e-17, 5.285e-17, 4.66e-17, 4.129e-17, 3.673e-17, 3.276e-17, 2.928e-17, 2.618e-17, 2.341e-17, 2.089e-17, 1.87e-17, 1.669e-17, 1.462e-17, 1.269e-17, 1.1e-17, 9.424e-18, 8.037e-18, 6.754e-18, 5.436e-18, 4.219e-18, 3.161e-18, 2.211e-18, 1.419e-18, 7.563e-19, 2.714e-19, 2.355e-23]

Try changing this parameter ↗

Type float64Shape 117

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:3
Declaration: ionization_HeI float

datasets.uv_background.data.ionization_HeII

ionization HeII

EFFECTIVE VALUE

[1.1e-15, 1.21e-15, 1.326e-15, 1.455e-15, 1.596e-15, 1.745e-15, 1.907e-15, 2.08e-15, 2.268e-15, 2.475e-15, 2.7e-15, 2.94e-15, 3.202e-15, 3.481e-15, 3.784e-15, 4.103e-15, 4.448e-15, 4.805e-15, 5.192e-15, 5.594e-15, 6.027e-15, 6.464e-15, 6.933e-15, 7.411e-15, 7.921e-15, 8.425e-15, 8.96e-15, 9.48e-15, 1.003e-14, 1.054e-14, 1.107e-14, 1.152e-14, 1.198e-14, 1.239e-14, 1.28e-14, 1.305e-14, 1.331e-14, 1.337e-14, 1.342e-14, 1.328e-14, 1.313e-14, 1.283e-14, 1.253e-14, 1.207e-14, 1.163e-14, 1.106e-14, 1.052e-14, 9.746e-15, 9.021e-15, 8.122e-15, 7.294e-15, 6.238e-15, 5.298e-15, 4.072e-15, 3.033e-15, 1.772e-15, 9.181e-16, 3.983e-16, 1.963e-16, 1.212e-16, 8.555e-17, 6.508e-17, 5.193e-17, 4.293e-17, 3.627e-17, 3.116e-17, 2.704e-17, 2.365e-17, 2.074e-17, 1.822e-17, 1.596e-17, 1.397e-17, 1.224e-17, 1.074e-17, 9.424e-18, 8.23e-18, 7.156e-18, 6.162e-18, 5.241e-18, 4.382e-18, 3.542e-18, 2.733e-18, 1.956e-18, 1.334e-18, 9.497e-19, 6.941e-19, 5.165e-19, 3.88e-19, 2.926e-19, 2.228e-19, 1.702e-19, 1.305e-19, 1.007e-19, 7.793e-20, 6.096e-20, 4.833e-20, 3.89e-20, 3.186e-20, 2.655e-20, 2.252e-20, 1.937e-20, 1.697e-20, 1.498e-20, 1.308e-20, 1.136e-20, 9.875e-21, 8.537e-21, 7.368e-21, 6.282e-21, 5.145e-21, 4.06e-21, 3.089e-21, 2.195e-21, 1.429e-21, 7.714e-22, 2.786e-22, 4.863e-26]

Try changing this parameter ↗

Type float64Shape 117

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:4
Declaration: ionization_HeII float

datasets.uv_background.data.redshift_coordinate

redshift coordinate

EFFECTIVE VALUE

[0, 0.01041, 0.02082, 0.0313, 0.04179, 0.05218, 0.06258, 0.07286, 0.08314, 0.09364, 0.1041, 0.1145, 0.1248, 0.1353, 0.1458, 0.1563, 0.1667, 0.1771, 0.1875, 0.1978, 0.2082, 0.2187, 0.2292, 0.2396, 0.2499, 0.2603, 0.2707, 0.2811, 0.2916, 0.3017, 0.3118, 0.3221, 0.3324, 0.3433, 0.3541, 0.3644, 0.3747, 0.3855, 0.3962, 0.4064, 0.4166, 0.4272, 0.4378, 0.4478, 0.4579, 0.4682, 0.4786, 0.4891, 0.4997, 0.5104, 0.5211, 0.5314, 0.5416, 0.5519, 0.5623, 0.5727, 0.5832, 0.5937, 0.6042, 0.6143, 0.6243, 0.6349, 0.6454, 0.656, 0.6665, 0.677, 0.6875, 0.698, 0.7084, 0.7188, 0.7292, 0.7395, 0.7497, 0.7599, 0.7701, 0.7806, 0.791, 0.8016, 0.8122, 0.8227, 0.8331, 0.8434, 0.8537, 0.8641, 0.8745, 0.885, 0.8954, 0.9059, 0.9165, 0.9267, 0.937, 0.9473, 0.9576, 0.9681, 0.9786, 0.9891, 0.9996, 1.01, 1.02, 1.031, 1.041, 1.051, 1.061, 1.072, 1.083, 1.093, 1.104, 1.114, 1.124, 1.135, 1.146, 1.157, 1.167, 1.177, 1.188, 1.197, 1.207]

Try changing this parameter ↗

Type float64Shape 117

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:1
Declaration: redshift_coordinate float

datasets.uv_background.output_file

output file

EFFECTIVE VALUE"./TREECOOL_ep"

Try changing this parameter ↗

Type str

Schema & provenance

Model metadata

Tags: arepo:dataset
Reads during evaluation: ?cooling.uv_background_file

Source history

Declared at: tables.dip:9
Declaration: output_file str = {?cooling.uv_background_file}

PARAMETER GROUP

Experiment

1 parameters

experiment.setup.kind

kind

EFFECTIVE VALUE"galaxy_merger_star_formation_3d"

Selects the scientific setup branch represented by this DIPL environment.

Try changing this parameter ↗

Type str

Schema & provenance

Model metadata

Applied schemas: experiment_settings, experiment_setup_selection
Supplied by schema: experiment_setup_selection
Allowed options: cosmological_star_formation, cosmological_gravity_only, mhd_shock_tube, alfven_wave_1d, cosmo_zoom_gravity_only_3d, current_sheet_2d, galaxy_merger_star_formation_3d, gresho_2d, interacting_blastwaves_1d, isolated_galaxy_collisionless_3d, noh_2d, noh_3d, polytrope_1d_spherical, shocktube_1d, wave_1d, yee_2d
URL: https://arepo-code.org/wp-content/userguide/simtypes.html

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/experiment.dip:6
Declaration: kind str
Modified at: profile.dip:4
Modification: kind = "galaxy_merger_star_formation_3d"

PARAMETER GROUP

Gravity

16 parameters

gravity.constant_internal

constant internal

EFFECTIVE VALUE0

Gravitational constant in the selected internal code-unit system.

Try changing this parameter ↗

Type float64

Scientific impact An explicit value defines a non-standard or natural unit system; it should not be set for cosmological integrations.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings
Supplied by schema: gravity_settings
Rationale: Zero asks Arepo to derive the physical value from the selected code units.
Scientific impact: An explicit value defines a non-standard or natural unit system; it should not be set for cosmological integrations.
Conflicts with: cosmological integration

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/gravity.dip:123
Declaration: constant_internal float = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.domain_decomposition.active_fraction

active fraction

EFFECTIVE VALUE0.01

Active-particle fraction that triggers a domain decomposition.

Try changing this parameter ↗

Type float64

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings, gravity_domain_decomposition
Supplied by schema: gravity_domain_decomposition
Validation condition: {.} >= 0
Performance impact: Larger values avoid domain-decomposition work at synchronization points with few active particles.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/gravity.dip:66
Declaration: active_fraction float = 0.01
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:61
Modification: active_fraction = 0.01

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.domain_decomposition.multiple_domains

multiple domains

EFFECTIVE VALUE8

Number of simultaneous domain decompositions.

Try changing this parameter ↗

Type int64

Validation {.} >= 1

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings, gravity_domain_decomposition
Supplied by schema: gravity_domain_decomposition
Validation condition: {.} >= 1
Performance impact: Too few domains can prevent simultaneous CPU and memory load balance; too many increase MPI communication across domain boundaries.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/gravity.dip:48
Declaration: multiple_domains int = 1
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:59
Modification: multiple_domains = 2
Modified at: profile.dip:77
Modification: multiple_domains = 8

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.domain_decomposition.top_node_factor

top node factor

EFFECTIVE VALUE2.5

Top-level tree-node allocation factor.

Try changing this parameter ↗

Type float64

Validation {.} > 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings, gravity_domain_decomposition
Supplied by schema: gravity_domain_decomposition
Validation condition: {.} > 0
Performance impact: Higher values enable finer Peano-Hilbert load cuts but increase the replicated top-level-tree memory on every MPI rank.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/gravity.dip:57
Declaration: top_node_factor float = 2.5
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:60
Modification: top_node_factor = 4
Modified at: profile.dip:78
Modification: top_node_factor = 2.5

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.force_accuracy.integration

integration

EFFECTIVE VALUE0.012

Integration accuracy tolerance.

Try changing this parameter ↗

Type float64

Scientific impact Sets eta in the gravitational timestep criterion; collisionless cosmological timesteps scale approximately as eta^0.5.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings, gravity_force_accuracy
Supplied by schema: gravity_force_accuracy
Scientific impact: Sets eta in the gravitational timestep criterion; collisionless cosmological timesteps scale approximately as eta^0.5.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/gravity.dip:6
Declaration: integration float = 0.012
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:54
Modification: integration = 0.1
Modified at: profile.dip:73
Modification: integration = 0.012

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.force_accuracy.opening_angle

opening angle

EFFECTIVE VALUE0.7

Tree opening angle.

Try changing this parameter ↗

Type float64

Scientific impact Controls the initial Barnes-Hut force estimate and all tree forces when the geometric opening criterion is selected.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings, gravity_force_accuracy
Supplied by schema: gravity_force_accuracy
Scientific impact: Controls the initial Barnes-Hut force estimate and all tree forces when the geometric opening criterion is selected.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/gravity.dip:14
Declaration: opening_angle float = 0.7
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:55
Modification: opening_angle = 0.1
Modified at: profile.dip:74
Modification: opening_angle = 0.7

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.force_accuracy.opening_criterion

opening criterion

EFFECTIVE VALUE1

Tree opening-criterion selector.

Try changing this parameter ↗

Type int64

Scientific impact Selects relative force-error control (1) or the geometric Barnes-Hut criterion (0).

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings, gravity_force_accuracy
Supplied by schema: gravity_force_accuracy
Allowed options: 0, 1
Recommended range: 1 (relative opening criterion), which Arepo normally recommends.
Scientific impact: Selects relative force-error control (1) or the geometric Barnes-Hut criterion (0).

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/gravity.dip:31
Declaration: opening_criterion int = 1
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:57
Modification: opening_criterion = 1

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.force_accuracy.relative_force

relative force

EFFECTIVE VALUE2.5e-3

Relative force-error tolerance.

Try changing this parameter ↗

Type float64

Scientific impact Controls tree-force accuracy when using Arepo's relative opening criterion.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings, gravity_force_accuracy
Supplied by schema: gravity_force_accuracy
Scientific impact: Controls tree-force accuracy when using Arepo's relative opening criterion.
Requires: gravity.force_accuracy.opening_criterion=1

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/gravity.dip:22
Declaration: relative_force float = 0.0025
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:56
Modification: relative_force = 0.1
Modified at: profile.dip:75
Modification: relative_force = 0.0025

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.hydro.gas_softening_factor

gas softening factor

EFFECTIVE VALUE2.5

Gas-cell softening relative to the assigned base softening.

Try changing this parameter ↗

Type float64

Scientific impact Adaptive gas-cell softening is selected from a logarithmically spaced table after scaling the cell radius by this factor.

Validation {.} > 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings, gravity_hydro_softening
Supplied by schema: gravity_hydro_softening
Validation condition: {.} > 0
Scientific impact: Adaptive gas-cell softening is selected from a logarithmically spaced table after scaling the cell radius by this factor.
Requires: build.mesh.adaptive_hydro_softening

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/gravity.dip:79
Declaration: gas_softening_factor float = 1
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:63
Modification: gas_softening_factor = 0.01
Modified at: profile.dip:80
Modification: gas_softening_factor = 2.5

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.hydro.minimum_comoving

minimum comoving

EFFECTIVE VALUE1

Minimum comoving adaptive gas softening.

Try changing this parameter ↗

Type float64Units arepo_length

Scientific impact Sets the smallest entry in the adaptive gas-softening table.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings, gravity_hydro_softening
Supplied by schema: gravity_hydro_softening
Scientific impact: Sets the smallest entry in the adaptive gas-softening table.
Requires: build.mesh.adaptive_hydro_softening

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/gravity.dip:88
Declaration: minimum_comoving float = 0 arepo_length
Modified at: profile.dip:81
Modification: minimum_comoving = 1 arepo_length

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.hydro.spacing

spacing

EFFECTIVE VALUE1.2

Geometric spacing between adaptive gas softening levels.

Try changing this parameter ↗

Type float64

Scientific impact Sets the spacing of the logarithmic adaptive gas-softening table.

Validation {.} >= 1

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings, gravity_hydro_softening
Supplied by schema: gravity_hydro_softening
Validation condition: {.} >= 1
Recommended range: At least 1; values define the geometric ratio between adjacent adaptive softening levels.
Scientific impact: Sets the spacing of the logarithmic adaptive gas-softening table.
Requires: build.mesh.adaptive_hydro_softening

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/gravity.dip:96
Declaration: spacing float = 1
Modified at: profile.dip:82
Modification: spacing = 1.2

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.softenings.comoving[0].length

length

EFFECTIVE VALUE2

Gravity softening length in Arepo code-length units; the schema default is overridden by each setup.

Try changing this parameter ↗

Type float64Units arepo_length

Scientific impact A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Validation {.} > 0 arepo_length

Schema & provenance

Model metadata

Applied schemas: gravity_settings, gravity_softening_length
Supplied by schema: gravity_softening_length
Validation condition: {.} > 0 arepo_length
Scientific impact: A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/two_softenings.dip:6
Modification: length = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/gravity.dip:111
Modification: length float = 0.1 arepo_length
Modified at: profile.dip:85
Modification: length = 2 arepo_length

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.softenings.comoving[1].length

length

EFFECTIVE VALUE2

Gravity softening length in Arepo code-length units; the schema default is overridden by each setup.

Try changing this parameter ↗

Type float64Units arepo_length

Scientific impact A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Validation {.} > 0 arepo_length

Schema & provenance

Model metadata

Applied schemas: gravity_settings, gravity_softening_length
Supplied by schema: gravity_softening_length
Validation condition: {.} > 0 arepo_length
Scientific impact: A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/two_softenings.dip:8
Modification: length = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/gravity.dip:111
Modification: length float = 0.1 arepo_length
Modified at: profile.dip:87
Modification: length = 2 arepo_length

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.softenings.particle_type_map

particle type map

EFFECTIVE VALUE[0, 1, 1, 1, 1, 1]

Try changing this parameter ↗

Type int32Shape 6

Schema & provenance

Model metadata

Applied schemas: gravity_settings

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/two_softenings.dip:14
Declaration: particle_type_map int[6] = [0,0,0,0,0,0]
Modified at: profile.dip:92
Modification: particle_type_map = [0,1,1,1,1,1]

gravity.softenings.physical_maximum[0].length

length

EFFECTIVE VALUE2

Gravity softening length in Arepo code-length units; the schema default is overridden by each setup.

Try changing this parameter ↗

Type float64Units arepo_length

Scientific impact A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Validation {.} > 0 arepo_length

Schema & provenance

Model metadata

Applied schemas: gravity_settings, gravity_softening_length
Supplied by schema: gravity_softening_length
Validation condition: {.} > 0 arepo_length
Scientific impact: A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/two_softenings.dip:11
Modification: length = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/gravity.dip:111
Modification: length float = 0.1 arepo_length
Modified at: profile.dip:89
Modification: length = 2 arepo_length

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.softenings.physical_maximum[1].length

length

EFFECTIVE VALUE2

Gravity softening length in Arepo code-length units; the schema default is overridden by each setup.

Try changing this parameter ↗

Type float64Units arepo_length

Scientific impact A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Validation {.} > 0 arepo_length

Schema & provenance

Model metadata

Applied schemas: gravity_settings, gravity_softening_length
Supplied by schema: gravity_softening_length
Validation condition: {.} > 0 arepo_length
Scientific impact: A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/two_softenings.dip:13
Modification: length = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/gravity.dip:111
Modification: length float = 0.1 arepo_length
Modified at: profile.dip:91
Modification: length = 2 arepo_length

Notes

Author guidance (advisory; not enforced by these metadata fields):

PARAMETER GROUP

Hydrodynamics

9 parameters

hydrodynamics.courant_factor

courant factor

EFFECTIVE VALUE0.3

Courant-Friedrichs-Lewy timestep factor.

Try changing this parameter ↗

Type float64

Scientific impact Multiplies the cell-wise CFL condition and therefore directly limits hydrodynamical timesteps.

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: hydrodynamics_settings
Supplied by schema: hydrodynamics_settings
Validation condition: {.} >= 0
Scientific impact: Multiplies the cell-wise CFL condition and therefore directly limits hydrodynamical timesteps.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/hydrodynamics.dip:6
Declaration: courant_factor float = 0.3
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:65
Modification: courant_factor = 0.3

Notes

Author guidance (advisory; not enforced by these metadata fields):

hydrodynamics.initial_gas_temperature

initial gas temperature

EFFECTIVE VALUE244.8

Initial gas temperature used where initial conditions lack it.

Try changing this parameter ↗

Type float64Units K

Scientific impact Applied only when positive and when the IC gas temperature is zero; the assumed ionization state changes above 10^4 K.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: hydrodynamics_settings
Supplied by schema: hydrodynamics_settings
Scientific impact: Applied only when positive and when the IC gas temperature is zero; the assumed ionization state changes above 10^4 K.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/hydrodynamics.dip:14
Declaration: initial_gas_temperature float = 0 K
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:66
Modification: initial_gas_temperature = 0 K
Modified at: profile.dip:67
Modification: initial_gas_temperature = 244.8095 K

Notes

Author guidance (advisory; not enforced by these metadata fields):

hydrodynamics.internal_energy_density_limit

internal energy density limit

EFFECTIVE VALUE0

Density threshold for an internal-energy limit.

Try changing this parameter ↗

Type float64Units arepo_density

Scientific impact Activates the associated internal-energy floor below this density threshold.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: hydrodynamics_settings
Supplied by schema: hydrodynamics_settings
Scientific impact: Activates the associated internal-energy floor below this density threshold.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/hydrodynamics.dip:35
Declaration: internal_energy_density_limit float = 0 arepo_density
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:69
Modification: internal_energy_density_limit = 0 arepo_density

Notes

Author guidance (advisory; not enforced by these metadata fields):

hydrodynamics.internal_energy_floor

internal energy floor

EFFECTIVE VALUE0

Internal-energy floor applied below the configured density threshold.

Try changing this parameter ↗

Type float64Units arepo_specific_energy

Scientific impact Prevents gas below the configured density threshold from cooling below this internal energy.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: hydrodynamics_settings
Supplied by schema: hydrodynamics_settings
Scientific impact: Prevents gas below the configured density threshold from cooling below this internal energy.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/hydrodynamics.dip:44
Declaration: internal_energy_floor float = 0 arepo_specific_energy
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:70
Modification: internal_energy_floor = 0 arepo_specific_energy

Notes

Author guidance (advisory; not enforced by these metadata fields):

hydrodynamics.maximum_neighbor_deviation

maximum neighbor deviation

EFFECTIVE VALUE4

Permitted deviation from the desired neighbor count.

Try changing this parameter ↗

Type int64

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: hydrodynamics_settings
Supplied by schema: hydrodynamics_settings
Validation condition: {.} >= 0
Performance impact: A larger tolerance reduces iterations required to determine the correct initial neighbour radius.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/hydrodynamics.dip:68
Declaration: maximum_neighbor_deviation int = 4
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:73
Modification: maximum_neighbor_deviation = 2
Modified at: profile.dip:70
Modification: maximum_neighbor_deviation = 4

Notes

Author guidance (advisory; not enforced by these metadata fields):

hydrodynamics.minimum_gas_temperature

minimum gas temperature

EFFECTIVE VALUE5

Temperature floor applied to gas.

Try changing this parameter ↗

Type float64Units K

Scientific impact Sets a thermodynamic floor for cooling physics.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: hydrodynamics_settings
Supplied by schema: hydrodynamics_settings
Scientific impact: Sets a thermodynamic floor for cooling physics.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/hydrodynamics.dip:21
Declaration: minimum_gas_temperature float = 0 K
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:67
Modification: minimum_gas_temperature = 0 K
Modified at: profile.dip:68
Modification: minimum_gas_temperature = 5 K

Notes

Author guidance (advisory; not enforced by these metadata fields):

hydrodynamics.minimum_specific_energy

minimum specific energy

EFFECTIVE VALUE0

Minimum specific internal energy.

Try changing this parameter ↗

Type float64Units arepo_specific_energy

Scientific impact Provides a global lower bound on the gas specific internal energy.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: hydrodynamics_settings
Supplied by schema: hydrodynamics_settings
Scientific impact: Provides a global lower bound on the gas specific internal energy.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/hydrodynamics.dip:53
Declaration: minimum_specific_energy float = 0 arepo_specific_energy
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:71
Modification: minimum_specific_energy = 0 arepo_specific_energy

Notes

Author guidance (advisory; not enforced by these metadata fields):

hydrodynamics.minimum_startup_density

minimum startup density

EFFECTIVE VALUE1e-10

Minimum density imposed while starting the run.

Try changing this parameter ↗

Type float64Units arepo_density

Scientific impact All gas cells below this density immediately after IC loading are raised to this value.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: hydrodynamics_settings
Supplied by schema: hydrodynamics_settings
Scientific impact: All gas cells below this density immediately after IC loading are raised to this value.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/hydrodynamics.dip:28
Declaration: minimum_startup_density float = 0 arepo_density
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:68
Modification: minimum_startup_density = 0 arepo_density
Modified at: profile.dip:69
Modification: minimum_startup_density = 1e-10 arepo_density

Notes

Author guidance (advisory; not enforced by these metadata fields):

hydrodynamics.target_neighbors

target neighbors

EFFECTIVE VALUE64

Desired hydrodynamic neighbor count.

Try changing this parameter ↗

Type int64

Scientific impact Sets the target number of nearest neighbours used for the initial gas-cell density/size estimate.

Validation {.} > 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: hydrodynamics_settings
Supplied by schema: hydrodynamics_settings
Validation condition: {.} > 0
Scientific impact: Sets the target number of nearest neighbours used for the initial gas-cell density/size estimate.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/hydrodynamics.dip:60
Declaration: target_neighbors int = 64
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:72
Modification: target_neighbors = 64

Notes

Author guidance (advisory; not enforced by these metadata fields):

PARAMETER GROUP

Input

2 parameters

input.initial_conditions.format

format

EFFECTIVE VALUE3

Serialization format used to read the initial conditions.

Try changing this parameter ↗

Type int64

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: input_settings, initial_conditions_settings
Supplied by schema: initial_conditions_settings
Allowed options: 1, 2, 3
Recommended range: 3 (HDF5), unless a legacy binary format is specifically required.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/input.dip:12
Declaration: format int
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:6
Modification: format = 3

Notes

Author guidance (advisory; not enforced by these metadata fields):

input.initial_conditions.path

path

EFFECTIVE VALUE"./ICs_1_1_merger_30_15_45_0_rmin10_start320_lowres.dat-with-grid"

Initial-condition file path, without an automatically appended format suffix.

Try changing this parameter ↗

Type str

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: input_settings, initial_conditions_settings
Supplied by schema: initial_conditions_settings
Rationale: For multi-file ICs specify the basename without the trailing file number; for HDF5 omit the .hdf5 suffix because Arepo appends it.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/input.dip:5
Declaration: path str
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:5
Modification: path = "./IC"
Modified at: profile.dip:42
Modification: path = "./ICs_1_1_merger_30_15_45_0_rmin10_start320_lowres.dat-with-grid"

Notes

Author guidance (advisory; not enforced by these metadata fields):

PARAMETER GROUP

Mesh

11 parameters

mesh.refinement.derefinement_criterion

derefinement criterion

EFFECTIVE VALUE1

Arepo derefinement-criterion selector.

Try changing this parameter ↗

Type int64

Scientific impact Selects the algorithm governing when gas cells are derefined.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: mesh_settings, mesh_refinement
Supplied by schema: mesh_refinement
Scientific impact: Selects the algorithm governing when gas cells are derefined.
Requires: build.mesh.refinement

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/mesh.dip:64
Declaration: derefinement_criterion int = 1

Notes

Author guidance (advisory; not enforced by these metadata fields):

mesh.refinement.maximum_volume

maximum volume

EFFECTIVE VALUE1e9

Try changing this parameter ↗

Type float64Units arepo_length3

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: mesh_settings, mesh_refinement

Source history

Declared at: profile.dip:105
Declaration: maximum_volume float = 1e9 arepo_length3

mesh.refinement.maximum_volume_difference

maximum volume difference

EFFECTIVE VALUE10

Try changing this parameter ↗

Type float64

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: mesh_settings, mesh_refinement

Source history

Declared at: profile.dip:99
Declaration: maximum_volume_difference float = 10

mesh.refinement.mean_volume

mean volume

EFFECTIVE VALUE6.68e4

Try changing this parameter ↗

Type float64Units arepo_length3

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: mesh_settings, mesh_refinement

Source history

Declared at: profile.dip:96
Declaration: mean_volume float = 66800.2 arepo_length3

mesh.refinement.minimum_volume

minimum volume

EFFECTIVE VALUE1

Try changing this parameter ↗

Type float64Units arepo_length3

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: mesh_settings, mesh_refinement

Source history

Declared at: profile.dip:102
Declaration: minimum_volume float = 1 arepo_length3

mesh.refinement.reference_gas_mass

reference gas mass

EFFECTIVE VALUE9.762e-5

Reference gas-cell mass for refinement.

Try changing this parameter ↗

Type float64Units arepo_mass

Scientific impact Defines the mass scale around which the default refinement and derefinement maintain gas-cell resolution.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: mesh_settings, mesh_refinement
Supplied by schema: mesh_refinement
Scientific impact: Defines the mass scale around which the default refinement and derefinement maintain gas-cell resolution.
Requires: build.mesh.refinement

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/mesh.dip:38
Declaration: reference_gas_mass float = 0 arepo_mass
Modified at: profile.dip:95
Modification: reference_gas_mass = 9.76211e-5 arepo_mass

Notes

Author guidance (advisory; not enforced by these metadata fields):

mesh.refinement.refinement_criterion

refinement criterion

EFFECTIVE VALUE1

Arepo refinement-criterion selector.

Try changing this parameter ↗

Type int64

Scientific impact Selects the algorithm governing when gas cells are refined.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: mesh_settings, mesh_refinement
Supplied by schema: mesh_refinement
Scientific impact: Selects the algorithm governing when gas cells are refined.
Requires: build.mesh.refinement

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/mesh.dip:55
Declaration: refinement_criterion int = 1

Notes

Author guidance (advisory; not enforced by these metadata fields):

mesh.refinement.target_gas_mass_factor

target gas mass factor

EFFECTIVE VALUE1

Target gas-mass multiplier for refinement.

Try changing this parameter ↗

Type float64

Scientific impact Scales the reference gas-cell mass used by the refinement target.

Validation {.} > 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: mesh_settings, mesh_refinement
Supplied by schema: mesh_refinement
Validation condition: {.} > 0
Scientific impact: Scales the reference gas-cell mass used by the refinement target.
Requires: build.mesh.refinement

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/mesh.dip:46
Declaration: target_gas_mass_factor float = 1

Notes

Author guidance (advisory; not enforced by these metadata fields):

mesh.regularization.maximum_face_angle_factor

maximum face angle factor

EFFECTIVE VALUE2.25

Maximum-face-angle roundness threshold.

Try changing this parameter ↗

Type float64

Scientific impact Elongated cells above the face-angle thresholds are not refined and their mesh generators are moved away from pure Lagrangian motion.

Validation {.} > 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: mesh_settings, mesh_regularization
Supplied by schema: mesh_regularization
Validation condition: {.} > 0
Scientific impact: Elongated cells above the face-angle thresholds are not refined and their mesh generators are moved away from pure Lagrangian motion.
Requires: build.mesh.face_angle_regularization
Conflicts with: build.geometry.static_mesh

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/mesh.dip:13
Declaration: maximum_face_angle_factor float = 2.25
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:77
Modification: maximum_face_angle_factor = 2.25

Notes

Author guidance (advisory; not enforced by these metadata fields):

mesh.regularization.shaping_factor

shaping factor

EFFECTIVE VALUE1

Centre-of-mass mesh-roundness threshold; zero disables this criterion.

Try changing this parameter ↗

Type float64

Scientific impact Large centre-of-mass offsets suppress refinement and add mesh-generator motion to restore roundness.

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: mesh_settings, mesh_regularization
Supplied by schema: mesh_regularization
Validation condition: {.} >= 0
Scientific impact: Large centre-of-mass offsets suppress refinement and add mesh-generator motion to restore roundness.
Conflicts with: build.geometry.static_mesh, build.mesh.face_angle_regularization

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/mesh.dip:24
Declaration: shaping_factor float = 1

Notes

Author guidance (advisory; not enforced by these metadata fields):

mesh.regularization.shaping_speed

shaping speed

EFFECTIVE VALUE0.5

Speed of mesh regularization.

Try changing this parameter ↗

Type float64

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: mesh_settings, mesh_regularization
Supplied by schema: mesh_regularization
Validation condition: {.} >= 0
Performance impact: Controls the strength of mesh-generator motion used to restore cell roundness.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/mesh.dip:5
Declaration: shaping_speed float = 0.5
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:76
Modification: shaping_speed = 0.5

Notes

Author guidance (advisory; not enforced by these metadata fields):

PARAMETER GROUP

Output

7 parameters

output.schedule.enabled

enabled

EFFECTIVE VALUEtrue

Whether Arepo reads an explicit output-time schedule file.

Try changing this parameter ↗

Type bool

Scientific impact Selects explicitly chosen output epochs instead of the regular cadence defined by simulation.time.first_snapshot and simulation.time.snapshot_interval.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: output_settings, output_schedule_settings
Supplied by schema: output_schedule_settings
Scientific impact: Selects explicitly chosen output epochs instead of the regular cadence defined by simulation.time.first_snapshot and simulation.time.snapshot_interval.
Requires: output.schedule.filename

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/output.dip:6
Declaration: enabled bool = false
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:9
Modification: enabled = false
Modified at: profile.dip:49
Modification: enabled = true

Notes

Author guidance (advisory; not enforced by these metadata fields):

output.schedule.filename

filename

EFFECTIVE VALUE"./output_list.txt"

Path to the output-time schedule file when scheduling is enabled.

Try changing this parameter ↗

Type str

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: output_settings, output_schedule_settings
Supplied by schema: output_schedule_settings

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/output.dip:15
Declaration: filename str
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:10
Modification: filename = "ol"
Modified at: profile.dip:50
Modification: filename = "./output_list.txt"

output.snapshots.base_name

base name

EFFECTIVE VALUE"snap"

Prefix used for snapshot filenames.

Try changing this parameter ↗

Type str

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: output_settings, snapshot_settings
Supplied by schema: snapshot_settings

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/snapshots.dip:11
Declaration: base_name str
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:13
Modification: base_name = "snap"

output.snapshots.directory

files

EFFECTIVE VALUE1

Number of files produced for each snapshot.

Try changing this parameter ↗

Type int64

Validation {.} >= 1

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: output_settings, snapshot_settings
Supplied by schema: snapshot_settings
Validation condition: {.} >= 1
Recommended range: 1 through the number of MPI ranks.
Performance impact: Splitting a snapshot can improve I/O throughput and avoid very large files, depending on the filesystem.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/snapshots.dip:29
Declaration: files int
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:15
Modification: files = 1

Notes

Author guidance (advisory; not enforced by these metadata fields):

output.snapshots.format

format

EFFECTIVE VALUE3

Arepo snapshot serialization format.

Try changing this parameter ↗

Type int64

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: output_settings, snapshot_settings
Supplied by schema: snapshot_settings
Allowed options: 1, 2, 3
Recommended range: 3 (HDF5), unless a legacy binary format is specifically required.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/snapshots.dip:17
Declaration: format int
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:14
Modification: format = 3

Notes

Author guidance (advisory; not enforced by these metadata fields):

output.snapshots.parallel_files

parallel files

EFFECTIVE VALUE1

Maximum number of snapshot files written concurrently.

Try changing this parameter ↗

Type int64

Validation {.} >= 1

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: output_settings, snapshot_settings
Supplied by schema: snapshot_settings
Validation condition: {.} >= 1
Recommended range: No greater than the number of MPI ranks.
Performance impact: Restricting concurrency can protect heavily used filesystems on large runs, at the cost of slower I/O.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/snapshots.dip:38
Declaration: parallel_files int
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:16
Modification: parallel_files = 1

Notes

Author guidance (advisory; not enforced by these metadata fields):

PARAMETER GROUP

Output Schedule

2 parameters

output_schedule.time

time

EFFECTIVE VALUE

[0, 0.09677, 0.1935, 0.2903, 0.3871, 0.4839, 0.5806, 0.6774, 0.7742, 0.871, 0.9677, 1.065, 1.161, 1.258, 1.355, 1.452, 1.548, 1.645, 1.742, 1.839, 1.935, 2.032, 2.129, 2.226, 2.323, 2.419, 2.516, 2.613, 2.71, 2.806, 2.903, 3]

Try changing this parameter ↗

Type float64Units arepo_timeShape 32

Schema & provenance

Source history

Declared at: DIP0_FILE18_TABLE:1
Declaration: time float arepo_time

output_schedule.write_flag

write flag

EFFECTIVE VALUE[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]

Try changing this parameter ↗

Type int32Shape 32

Schema & provenance

Source history

Declared at: DIP0_FILE18_TABLE:2
Declaration: write_flag int

PARAMETER GROUP

Resources

6 parameters

resources.execution.resubmit

resubmit

EFFECTIVE VALUEfalse

Whether Arepo should submit a continuation job after reaching its time limit.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: resources_settings, execution_resources
Supplied by schema: execution_resources
Requires: resources.execution.resubmit_command

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/resources.dip:48
Declaration: resubmit bool = false
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:25
Modification: resubmit = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

resources.execution.resubmit_command

resubmit command

EFFECTIVE VALUE"my-scriptfile"

Command used to submit the continuation job when resubmission is enabled.

Try changing this parameter ↗

Type str

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: resources_settings, execution_resources
Supplied by schema: execution_resources

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/resources.dip:55
Declaration: resubmit_command str
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:26
Modification: resubmit_command = "my-scriptfile"

resources.memory.per_rank

per rank

EFFECTIVE VALUE2500

Memory allocated to each MPI rank, in MiB.

Try changing this parameter ↗

Type int64

Validation {.} > 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: resources_settings, memory_resources
Supplied by schema: memory_resources
Validation condition: {.} > 0
Recommended range: Up to about 95% of physical memory available per MPI rank.
Performance impact: Arepo reserves one contiguous pool of this size at startup; insufficient space terminates the run, while excessive allocation leaves too little room for MPI and the operating system.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/resources.dip:5
Declaration: per_rank int
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:19
Modification: per_rank = 2500

Notes

Author guidance (advisory; not enforced by these metadata fields):

resources.wall_clock.limit

limit

EFFECTIVE VALUE9.3e4

Wall-clock limit before Arepo stops cleanly for restart.

Try changing this parameter ↗

Type float64Units s

Validation {.} > 0 s

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: resources_settings, wall_clock_resources
Supplied by schema: wall_clock_resources
Validation condition: {.} > 0 s
Rationale: Arepo begins clean termination and restart-file writing after 85% of this limit, reserving the remaining time for the final timestep and I/O.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/resources.dip:20
Declaration: limit float s
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:21
Modification: limit = 90000 s
Modified at: profile.dip:45
Modification: limit = 93000 s

Notes

Author guidance (advisory; not enforced by these metadata fields):

resources.wall_clock.log_flush_interval

log flush interval

EFFECTIVE VALUE0

Interval between explicit log-file flushes; zero leaves this disabled.

Try changing this parameter ↗

Type float64Units s

Validation {.} >= 0 s

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: resources_settings, wall_clock_resources
Supplied by schema: wall_clock_resources
Validation condition: {.} >= 0 s
Performance impact: A shorter interval improves log durability but increases filesystem activity.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/resources.dip:36
Declaration: log_flush_interval float s
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:23
Modification: log_flush_interval = 0 s

Notes

Author guidance (advisory; not enforced by these metadata fields):

resources.wall_clock.restart_interval

restart interval

EFFECTIVE VALUE1.2e4

Interval between restart-file writes.

Try changing this parameter ↗

Type float64Units s

Validation {.} >= 0 s

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: resources_settings, wall_clock_resources
Supplied by schema: wall_clock_resources
Validation condition: {.} >= 0 s
Performance impact: Shorter intervals reduce work lost after an unexpected interruption but increase restart I/O.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/resources.dip:28
Declaration: restart_interval float s
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:22
Modification: restart_interval = 9000 s
Modified at: profile.dip:46
Modification: restart_interval = 12000 s

Notes

Author guidance (advisory; not enforced by these metadata fields):

PARAMETER GROUP

Simulation

13 parameters

simulation.domain.boundary

boundary

EFFECTIVE VALUE"non_periodic"

Whether the simulation domain has periodic boundaries.

Try changing this parameter ↗

Type str

Scientific impact Controls gravitational boundary conditions; hydrodynamic boundaries are compile-time directional settings.

Schema & provenance

Model metadata

Applied schemas: simulation_settings, simulation_domain
Supplied by schema: simulation_domain
Allowed options: periodic, non_periodic
Scientific impact: Controls gravitational boundary conditions; hydrodynamic boundaries are compile-time directional settings.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/simulation.dip:17
Declaration: boundary str
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:29
Modification: boundary = "periodic"
Modified at: profile.dip:55
Modification: boundary = "non_periodic"

Notes

Author guidance (advisory; not enforced by these metadata fields):

simulation.domain.box.size

size

EFFECTIVE VALUE649.2

Simulation-box edge length in the selected Arepo code-length unit.

Try changing this parameter ↗

Type float64Units arepo_length

Scientific impact Initial-condition coordinates normally must lie within [0, BoxSize] in every dimension.

Validation {.} > 0 arepo_length

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: simulation_settings, simulation_domain, simulation_box
Supplied by schema: simulation_box
Validation condition: {.} > 0 arepo_length
Scientific impact: Initial-condition coordinates normally must lie within [0, BoxSize] in every dimension.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/simulation.dip:5
Declaration: size float arepo_length
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:31
Modification: size = 1 arepo_length
Modified at: profile.dip:57
Modification: size = 649.201 arepo_length

Notes

Author guidance (advisory; not enforced by these metadata fields):

simulation.time.begin

begin

EFFECTIVE VALUE0

Initial integration coordinate; often derived from the initial redshift.

Try changing this parameter ↗

Type float64

Scientific impact For a cosmological run this is the initial scale factor.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Scientific impact: For a cosmological run this is the initial scale factor.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/simulation.dip:51
Declaration: begin float
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:36
Modification: begin = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

simulation.time.coordinate

coordinate

EFFECTIVE VALUE"linear"

Independent coordinate used by the time integrator.

Try changing this parameter ↗

Type str

Scientific impact With scale_factor, Arepo evolves an expanding cosmology and uses scale factor as its time coordinate; linear uses Newtonian physical coordinates.

Schema & provenance

Model metadata

Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Allowed options: scale_factor, linear
Scientific impact: With scale_factor, Arepo evolves an expanding cosmology and uses scale factor as its time coordinate; linear uses Newtonian physical coordinates.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/simulation.dip:35
Declaration: coordinate str
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:33
Modification: coordinate = "linear"

Notes

Author guidance (advisory; not enforced by these metadata fields):

simulation.time.end

end

EFFECTIVE VALUE3

Final integration coordinate.

Try changing this parameter ↗

Type float64

Scientific impact For a cosmological run this is the final scale factor.

Validation {.} >= {?simulation.time.begin}

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Validation condition: {.} >= {?simulation.time.begin}
Scientific impact: For a cosmological run this is the final scale factor.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/simulation.dip:58
Declaration: end float
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:37
Modification: end = 1
Modified at: profile.dip:59
Modification: end = 3

Notes

Author guidance (advisory; not enforced by these metadata fields):

simulation.time.final_redshift

final redshift

EFFECTIVE VALUE0

Redshift at which a cosmological integration ends.

Try changing this parameter ↗

Type float64

Schema & provenance

Model metadata

Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Used by: cosmology.final_redshift

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/simulation.dip:48
Declaration: final_redshift float
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:35
Modification: final_redshift = 0

simulation.time.first_snapshot

first snapshot

EFFECTIVE VALUE0

First regularly spaced snapshot time when no output schedule is used.

Try changing this parameter ↗

Type float64

Scientific impact For cosmological simulations this is the first output scale factor.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Scientific impact: For cosmological simulations this is the first output scale factor.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/simulation.dip:94
Declaration: first_snapshot float
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:41
Modification: first_snapshot = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

simulation.time.initial_redshift

initial redshift

EFFECTIVE VALUE0

Redshift represented by the initial conditions.

Try changing this parameter ↗

Type float64

Schema & provenance

Model metadata

Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Used by: cosmology.initial_redshift

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/simulation.dip:45
Declaration: initial_redshift float
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:34
Modification: initial_redshift = 0

simulation.time.maximum_step

maximum step

EFFECTIVE VALUE0.02344

Maximum permitted integration step.

Try changing this parameter ↗

Type float64

Scientific impact For comoving integrations this caps dln(a).

Validation {.} > 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Validation condition: {.} > 0
Rationale: Protects particles with very small accelerations from unphysically large timesteps.
Scientific impact: For comoving integrations this caps dln(a).

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/simulation.dip:66
Declaration: maximum_step float
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:38
Modification: maximum_step = 0.1
Modified at: profile.dip:60
Modification: maximum_step = 0.0234375

Notes

Author guidance (advisory; not enforced by these metadata fields):

simulation.time.minimum_step

minimum step

EFFECTIVE VALUE2e-8

Minimum permitted integration step; zero delegates the lower limit to Arepo.

Try changing this parameter ↗

Type float64

Scientific impact A requested smaller step normally stops Arepo; NOSTOP_WHEN_BELOW_MINTIMESTEP instead clamps it to this value.

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Validation condition: {.} >= 0
Scientific impact: A requested smaller step normally stops Arepo; NOSTOP_WHEN_BELOW_MINTIMESTEP instead clamps it to this value.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/simulation.dip:76
Declaration: minimum_step float
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:39
Modification: minimum_step = 1e-10
Modified at: profile.dip:61
Modification: minimum_step = 2e-8

Notes

Author guidance (advisory; not enforced by these metadata fields):

simulation.time.snapshot_interval

snapshot interval

EFFECTIVE VALUE0

Spacing of regular snapshots when no output schedule is used.

Try changing this parameter ↗

Type float64

Scientific impact Spacing is logarithmic in scale factor for cosmological runs and linear in time otherwise.

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Validation condition: {.} >= 0
Scientific impact: Spacing is logarithmic in scale factor for cosmological runs and linear in time otherwise.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/simulation.dip:101
Declaration: snapshot_interval float
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:42
Modification: snapshot_interval = 1
Modified at: profile.dip:63
Modification: snapshot_interval = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

simulation.time.statistics_interval

statistics interval

EFFECTIVE VALUE0.02344

Interval between time-statistics reports.

Try changing this parameter ↗

Type float64

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Validation condition: {.} >= 0
Performance impact: More frequent measurements increase diagnostic I/O; gravitational potential energy additionally requires build.gravity.evaluate_potential.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/simulation.dip:85
Declaration: statistics_interval float
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:40
Modification: statistics_interval = 0.005
Modified at: profile.dip:62
Modification: statistics_interval = 0.0234375

Notes

Author guidance (advisory; not enforced by these metadata fields):

simulation.time.timestep_criterion

timestep criterion

EFFECTIVE VALUE0

Global time-step criterion used by Arepo.

Try changing this parameter ↗

Type int64

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Allowed options: 0, 1
Recommended range: 0; this is the only criterion currently supported by Arepo.

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/simulation.dip:109
Declaration: timestep_criterion int
Modified at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/ideal_hydrodynamics.dip:43
Modification: timestep_criterion = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

PARAMETER GROUP

Star Formation

8 parameters

star_formation.cloud_temperature

cloud temperature

EFFECTIVE VALUE1e3

Cold-cloud temperature in the Springel-Hernquist model.

Try changing this parameter ↗

Type float64Units K

Scientific impact Sets the cold-cloud temperature in the Springel-Hernquist model.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: star_formation_settings
Supplied by schema: star_formation_settings
Scientific impact: Sets the cold-cloud temperature in the Springel-Hernquist model.
Requires: build.physics.star_formation

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/star_formation.dip:37
Declaration: cloud_temperature float K
Modified at: profile.dip:116
Modification: cloud_temperature = 1000 K

Notes

Author guidance (advisory; not enforced by these metadata fields):

star_formation.critical_overdensity

critical overdensity

EFFECTIVE VALUE57.7

Critical overdensity above which star formation may occur in a comoving integration.

Try changing this parameter ↗

Type float64

Scientific impact Sets the redshift-independent overdensity threshold for star formation in comoving integrations.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: star_formation_settings
Supplied by schema: star_formation_settings
Scientific impact: Sets the redshift-independent overdensity threshold for star formation in comoving integrations.
Requires: build.physics.star_formation

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/star_formation.dip:5
Declaration: critical_overdensity float
Modified at: profile.dip:112
Modification: critical_overdensity = 57.7

Notes

Author guidance (advisory; not enforced by these metadata fields):

star_formation.critical_physical_density

critical physical density

EFFECTIVE VALUE0

Critical physical density above which star formation may occur in a non-comoving integration.

Try changing this parameter ↗

Type float64Units kg*m-3

Scientific impact Sets the physical-density threshold used instead of critical_overdensity in non-comoving integrations.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: star_formation_settings
Supplied by schema: star_formation_settings
Scientific impact: Sets the physical-density threshold used instead of critical_overdensity in non-comoving integrations.
Requires: build.physics.star_formation

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/star_formation.dip:21
Declaration: critical_physical_density float kg/m3
Modified at: profile.dip:114
Modification: critical_physical_density = 0 kg/m3

Notes

Author guidance (advisory; not enforced by these metadata fields):

star_formation.evaporation_factor

evaporation factor

EFFECTIVE VALUE573

Cloud-evaporation efficiency in the Springel-Hernquist model.

Try changing this parameter ↗

Type float64

Scientific impact Sets the cloud-evaporation efficiency A in the Springel-Hernquist model.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: star_formation_settings
Supplied by schema: star_formation_settings
Scientific impact: Sets the cloud-evaporation efficiency A in the Springel-Hernquist model.
Requires: build.physics.star_formation

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/star_formation.dip:61
Declaration: evaporation_factor float
Modified at: profile.dip:119
Modification: evaporation_factor = 573

Notes

Author guidance (advisory; not enforced by these metadata fields):

star_formation.maximum_timescale

maximum timescale

EFFECTIVE VALUE2.27

Star-formation timescale at the density threshold.

Try changing this parameter ↗

Type float64Units arepo_time

Scientific impact Sets the star-formation timescale at threshold density; the local timescale decreases as density to the power -0.5.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: star_formation_settings
Supplied by schema: star_formation_settings
Scientific impact: Sets the star-formation timescale at threshold density; the local timescale decreases as density to the power -0.5.
Requires: build.physics.star_formation

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/star_formation.dip:45
Declaration: maximum_timescale float arepo_time
Modified at: profile.dip:117
Modification: maximum_timescale = 2.27 arepo_time

Notes

Author guidance (advisory; not enforced by these metadata fields):

star_formation.supernova_factor

supernova factor

EFFECTIVE VALUE0.1

Mass fraction of massive stars formed for an initial stellar population.

Try changing this parameter ↗

Type float64

Scientific impact Sets the stellar-IMF mass fraction assigned to massive stars above 8 solar masses.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: star_formation_settings
Supplied by schema: star_formation_settings
Scientific impact: Sets the stellar-IMF mass fraction assigned to massive stars above 8 solar masses.
Requires: build.physics.star_formation

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/star_formation.dip:53
Declaration: supernova_factor float
Modified at: profile.dip:118
Modification: supernova_factor = 0.1

Notes

Author guidance (advisory; not enforced by these metadata fields):

star_formation.supernova_temperature

supernova temperature

EFFECTIVE VALUE5.73e7

Hot inter-cloud-medium temperature in the Springel-Hernquist model.

Try changing this parameter ↗

Type float64Units K

Scientific impact Sets the hot inter-cloud-medium temperature in the Springel-Hernquist model.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: star_formation_settings
Supplied by schema: star_formation_settings
Scientific impact: Sets the hot inter-cloud-medium temperature in the Springel-Hernquist model.
Requires: build.physics.star_formation

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/star_formation.dip:29
Declaration: supernova_temperature float K
Modified at: profile.dip:115
Modification: supernova_temperature = 5.73e7 K

Notes

Author guidance (advisory; not enforced by these metadata fields):

star_formation.temperature_threshold

temperature threshold

EFFECTIVE VALUE1e6

Maximum gas temperature eligible for star formation.

Try changing this parameter ↗

Type float64Units K

Scientific impact Prevents star formation in gas hotter than the effective equation of state and this threshold; a low value excludes hot halo gas.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: star_formation_settings
Supplied by schema: star_formation_settings
Scientific impact: Prevents star formation in gas hotter than the effective equation of state and this threshold; a low value excludes hot halo gas.
Requires: build.physics.star_formation

Source history

Declared at: projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/../../profiles/schemas/star_formation.dip:13
Declaration: temperature_threshold float K
Modified at: profile.dip:113
Modification: temperature_threshold = 1e6 K

Notes

Author guidance (advisory; not enforced by these metadata fields):

Generated from SNT's Brief++ JSON document for projects/arepo/dipl/examples/galaxy_merger_star_formation_3d/DIPfile. Version: 0.9.3. The parameter values describe this bundled example; inspect a run's environment.diph5 to see overridden values.