# Define the system of units to use internally. InternalUnitSystem: UnitMass_in_cgs: 1.98848e43 # 10^10 M_sun in grams UnitLength_in_cgs: 3.08567758e24 # Mpc in centimeters UnitVelocity_in_cgs: 1e5 # km/s in centimeters per second UnitCurrent_in_cgs: 1. # Amperes UnitTemp_in_cgs: 1. # Kelvin # Cosmological parameters Cosmology: h: 0.6777 # Reduced Hubble constant a_begin: 0.5 # Initial scale-factor of the simulation a_end: 1.0 # Final scale factor of the simulation Omega_m: 0.307 # Matter density parameter Omega_lambda: 0.693 # Dark-energy density parameter Omega_b: 0.0455 # Baryon density parameter # Parameters governing the time integration TimeIntegration: time_begin: 0 # The starting time of the simulation (in internal units). time_end: 1.3e-2 # 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: 1e-5 # The maximal time-step size of the simulation (in internal units). # Parameters governing the snapshots Snapshots: basename: bh_swallowing_mpi # Common part of the name of output files time_first: 0. # Time of the first output (in internal units) delta_time: 3.e-5 # Time difference between consecutive outputs without cosmology (internal units) compression: 1 # Parameters governing the conserved quantities statistics Statistics: time_first: 0. delta_time: 1.e-5 # non cosmology time between statistics output # Parameters for the hydrodynamics scheme SPH: resolution_eta: 1.2348 # Target smoothing length in units of the mean inter-particle separation CFL_condition: 0.1 # Courant-Friedrich-Levy condition for time integration. minimal_temperature: 10. # Kelvin # Parameters related to the initial conditions InitialConditions: file_name: ./bh_swallowing.hdf5 # The file to read periodic: 1 Scheduler: max_top_level_cells: 8 tasks_per_cell: 500 # Parameters for the EAGLE "equation of state" EAGLEEntropyFloor: Jeans_density_threshold_H_p_cm3: 0.1 # Physical density above which the EAGLE Jeans limiter entropy floor kicks in expressed in Hydrogen atoms per cm^3. Jeans_over_density_threshold: 10. # Overdensity above which the EAGLE Jeans limiter entropy floor can kick in. Jeans_temperature_norm_K: 8000 # Temperature of the EAGLE Jeans limiter entropy floor at the density threshold expressed in Kelvin. Jeans_gamma_effective: 1.3333333 # Slope the of the EAGLE Jeans limiter entropy floor Cool_density_threshold_H_p_cm3: 1e-5 # Physical density above which the EAGLE Cool limiter entropy floor kicks in expressed in Hydrogen atoms per cm^3. Cool_over_density_threshold: 10. # Overdensity above which the EAGLE Cool limiter entropy floor can kick in. Cool_temperature_norm_K: 8000 # Temperature of the EAGLE Cool limiter entropy floor at the density threshold expressed in Kelvin. Cool_gamma_effective: 1. # Slope the of the EAGLE Cool limiter entropy floor # Metallicites read in for the gas and star EAGLEChemistry: init_abundance_metal: 0.01 init_abundance_Hydrogen: 0.752 init_abundance_Helium: 0.248 init_abundance_Carbon: 0.0 init_abundance_Nitrogen: 0.0 init_abundance_Oxygen: 0.0 init_abundance_Neon: 0.0 init_abundance_Magnesium: 0.0 init_abundance_Silicon: 0.0 init_abundance_Iron: 0.0 # Standard EAGLE cooling options EAGLECooling: dir_name: ./coolingtables/ # Location of the Wiersma+08 cooling tables H_reion_z: 11.5 # Redshift of Hydrogen re-ionization H_reion_eV_p_H: 2.0 He_reion_z_centre: 3.5 # Redshift of the centre of the Helium re-ionization Gaussian He_reion_z_sigma: 0.5 # Spread in redshift of the Helium re-ionization Gaussian He_reion_eV_p_H: 2.0 # Energy inject by Helium re-ionization in electron-volt per Hydrogen atom # EAGLE AGN model EAGLEAGN: subgrid_seed_mass_Msun: 1.5e5 # Black hole subgrid mass at creation time in solar masses. max_eddington_fraction: 1. # Maximal allowed accretion rate in units of the Eddington rate. viscous_alpha: 1e6 # Normalisation constant of the Bondi viscuous time-scale accretion reduction term radiative_efficiency: 0.1 # Fraction of the accreted mass that gets radiated. coupling_efficiency: 0.15 # Fraction of the radiated energy that couples to the gas in feedback events. AGN_delta_T_K: 3.16228e8 # Change in temperature to apply to the gas particle in an AGN feedback event in Kelvin. AGN_num_ngb_to_heat: 1. # Target number of gas neighbours to heat in an AGN feedback event.