# Define the system of units to use internally. InternalUnitSystem: UnitMass_in_cgs: 1.98841e43 # 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: cell_extra_gparts: 100 # (Optional) Number of spare gparts per top-level allocated at rebuild time for on-the-fly creation. # Parameters governing the time integration TimeIntegration: dt_min: 1e-16 # 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. dt_RMS_use_gas_only: 1 # Cosmological parameters Cosmology: h: 0.702 # Reduced Hubble constant a_begin: 0.00990099 # Initial scale-factor of the simulation a_end: 1.0 # Final scale factor of the simulation Omega_cdm: 0.2265 # Cold Dark Matter density parameter Omega_lambda: 0.728 # Dark-energy density parameter Omega_b: 0.0455 # Baryon density parameter Omega_r: 0. # (Optional) Radiation density parameter w_0: -1.0 # (Optional) Dark-energy equation-of-state parameter at z=0. w_a: 0. # (Optional) Dark-energy equation-of-state time evolution parameter. # Parameters governing the snapshots Snapshots: basename: agora_cosmo # 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 output_list_on: 1 # (Optional) Enable the output list output_list: output_list.txt # (Optional) File containing the output times (see documentation in "Parameter File" section) # Parameters governing the conserved quantities statistics Statistics: scale_factor_first: 0.00990099 delta_time: 1.02 # Time between statistics output # Parameters for the self-gravity scheme Gravity: eta: 0.025 # Constant dimensionless multiplier for time integration. MAC: adaptive # Choice of mulitpole acceptance criterion: 'adaptive' OR 'geometric'. epsilon_fmm: 0.001 # Tolerance parameter for the adaptive multipole acceptance criterion. theta_cr: 0.7 # Opening angle for the purely gemoetric criterion. comoving_DM_softening: 0.8 # Comoving softening length (in internal units). max_physical_DM_softening: 0.08 # Physical softening length (in internal units). comoving_baryon_softening: 0.8 # Comoving softening length (in internal units). max_physical_baryon_softening: 0.08 # Physical softening length (in internal units). softening_ratio_background: 0.0285714 # Fraction of the mean inter-particle separation to use as Plummer-equivalent softening for the background DM particles. mesh_side_length: 128 # 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: 0.2 # (Optional) Minimal allowed smoothing length in units of the softening. Defaults to 0 if unspecified. h_max: 100 # (Optional) Maximal allowed smoothing length in internal units. Defaults to FLT_MAX if unspecified. initial_temperature: 172.48 # Given in the output of music # Parameters related to the initial conditions InitialConditions: file_name: agora_swift.hdf5 # The file to read periodic: 1 # Non-periodic BCs cleanup_h_factors: 1 # Remove the h-factors inherited from Gadget shift: [0, 0, 0] # Centre the box cleanup_velocity_factors: 1 # (Optional) Clean up the scale-factors used in the definition of the velocity variable in the ICs (e.g. in Gadget files). cleanup_smoothing_lengths: 1 # (Optional) Clean the values of the smoothing lengths that are read in to remove stupid values. Set to 1 to activate. # Cooling with Grackle 2.0 GrackleCooling: cloudy_table: CloudyData_UVB=HM2012_shielded.h5 # Name of the Cloudy Table (available on the grackle bitbucket repository) with_UV_background: 1 # Enable or not the UV background redshift: -1 # 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: 0 # 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: 5 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: 3e4 # Upper limit to the temperature of a star forming particle density_threshold_Hpcm3: 1e-6 # Density threshold (in addition to the pressure floor) in Hydrogen atoms/cm3 n_stars_per_particle: 1 min_mass_frac: 0.5 GEARPressureFloor: jeans_factor: 8.75 GEARFeedback: supernovae_energy_erg: 1e51 supernovae_efficiency: 2.3 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: -1 # 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: 1e-4 scale_initial_metallicity: 1 Restarts: delta_hours: 10 # (Optional) decimal hours between dumps of restart files.