# Define the system of units to use internally. InternalUnitSystem: UnitMass_in_cgs: 1.98848e43 # 10^10 M_sun in grams UnitLength_in_cgs: 3.08567758e21 # kpc in centimeters UnitVelocity_in_cgs: 1e5 # km/s in centimeters per second UnitCurrent_in_cgs: 1 # Amperes UnitTemp_in_cgs: 1 # Kelvin Scheduler: max_top_level_cells: 16 cell_extra_sparts: 5000 # (Optional) Number of spare sparts per top-level allocated at rebuild time for on-the-fly creation. cell_extra_gparts: 5000 # (Optional) Number of spare sparts per top-level allocated at rebuild time for on-the-fly creation. cell_max_size: 8000 # (Optional) Maximal number of interactions per task if we force the split (this is the default value). cell_sub_size_pair_hydro: 2560 # (Optional) Maximal number of hydro-hydro interactions per sub-pair hydro/star task (this is the default value). cell_sub_size_self_hydro: 3200 # (Optional) Maximal number of hydro-hydro interactions per sub-self hydro/star task (this is the default value). cell_sub_size_pair_stars: 2560 # (Optional) Maximal number of hydro-star interactions per sub-pair hydro/star task (this is the default value). cell_sub_size_self_stars: 3200 # (Optional) Maximal number of hydro-star interactions per sub-self hydro/star task (this is the default value). cell_sub_size_pair_grav: 2560 # (Optional) Maximal number of interactions per sub-pair gravity task (this is the default value). cell_sub_size_self_grav: 3200 # (Optional) Maximal number of interactions per sub-self gravity task (this is the default value). cell_split_size: 100 # (Optional) Maximal number of particles per cell (this is the default value). # Parameters governing the time integration TimeIntegration: time_begin: 0. # The starting time of the simulation (in internal units). time_end: 0.25 # The end time of the simulation (in internal units). dt_min: 1e-10 # The minimal time-step size of the simulation (in internal units). dt_max: 0.1 # The maximal time-step size of the simulation (in internal units). max_dt_RMS_factor: 0.25 # (Optional) Dimensionless factor for the maximal displacement allowed based on the RMS velocities. # Parameters governing the snapshots Snapshots: basename: snapshot # Common part of the name of output files time_first: 0. # Time of the first output (in internal units) delta_time: 1e-2 # Time difference between consecutive outputs (in internal units) compression: 4 # Parameters governing the conserved quantities statistics Statistics: delta_time: 1e-3 # Time between statistics output # Parameters for the self-gravity scheme Gravity: eta: 0.05 # Constant dimensionless multiplier for time integration. MAC: geometric theta_cr: 0.7 use_tree_below_softening: 1 comoving_DM_softening: 0.08 # Comoving softening length (in internal units). max_physical_DM_softening: 0.08 # Physical softening length (in internal units). comoving_baryon_softening: 0.08 # Comoving softening length (in internal units). max_physical_baryon_softening: 0.08 # Physical softening length (in internal units). mesh_side_length: 32 # Number of cells along each axis for the periodic gravity mesh. # Parameters for the hydrodynamics scheme SPH: resolution_eta: 1.2348 # Target smoothing length in units of the mean inter-particle separation (1.2348 == 48Ngbs with the cubic spline kernel). CFL_condition: 0.1 # Courant-Friedrich-Levy condition for time integration. minimal_temperature: 10. # Kelvin h_min_ratio: 0.1095 # (Optional) Minimal allowed smoothing length in units of the softening. Defaults to 0 if unspecified. h_max: 10. # (Optional) Maximal allowed smoothing length in internal units. Defaults to FLT_MAX if unspecified. # Parameters related to the initial conditions InitialConditions: file_name: ./agora_disk.hdf5 # The file to read periodic: 0 # Non-periodic BCs cleanup_h_factors: 1 # Remove the h-factors inherited from Gadget shift: [674.1175, 674.1175, 674.1175] # Centre the box # Dimensionless pre-factor for the time-step condition LambdaCooling: lambda_nH2_cgs: 1e-22 # Cooling rate divided by square Hydrogen number density (in cgs units [erg * s^-1 * cm^3]) cooling_tstep_mult: 1.0 # Dimensionless pre-factor for the time-step condition # Cooling with Grackle 2.0 GrackleCooling: cloudy_table: CloudyData_UVB=HM2012.h5 # Name of the Cloudy Table (available on the grackle bitbucket repository) with_UV_background: 1 # Enable or not the UV background redshift: 0 # Redshift to use (-1 means time based redshift) with_metal_cooling: 1 # Enable or not the metal cooling provide_volumetric_heating_rates: 0 # User provide volumetric heating rates provide_specific_heating_rates: 0 # User provide specific heating rates self_shielding_method: -1 # Grackle (<= 3) or Gear self shielding method self_shielding_threshold_atom_per_cm3: 0.007 # Required only with GEAR's self shielding. Density threshold of the self shielding max_steps: 1000 convergence_limit: 1e-2 thermal_time_myr: 0 maximal_density_Hpcm3: -1 # Maximal density (in hydrogen atoms/cm^3) for cooling. Higher densities are floored to this value to ensure grackle works properly when interpolating beyond the cloudy_table maximal density. A value < 0 deactivates this parameter. GEARStarFormation: star_formation_efficiency: 0.01 # star formation efficiency (c_*) maximal_temperature_K: 1e10 # Upper limit to the temperature of a star forming particle density_threshold_Hpcm3: 10 # Density threshold in Hydrogen atoms/cm3 n_stars_per_particle: 1 min_mass_frac: 0.5 GEARPressureFloor: jeans_factor: 10 GEARFeedback: supernovae_energy_erg: 1e51 supernovae_efficiency: 0.1 yields_table: POPIIsw.h5 discrete_yields: 0 yields_table_first_stars: POPIIsw.h5 # Table containing the yields of the first stars. metallicity_max_first_stars: -5 # Maximal metallicity (in mass fraction) for a first star (-1 to deactivate). elements: [Fe, Mg, O, C, Al, Ca, Ba, Zn, Eu] # Elements to read in the yields table. The number of element should be one less than the number of elements (N) requested during the configuration (--with-chemistry=GEAR_N). GEARChemistry: initial_metallicity: 1 scale_initial_metallicity: 1 Restarts: delta_hours: 1. # (Optional) decimal hours between dumps of restart files.