# Define the system of units to use internally. InternalUnitSystem: UnitMass_in_cgs: 1.98841e43 # 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: 0.0099 # Initial scale-factor of the simulation (z = 100.0) a_end: 1.0 # Final scale factor of the simulation Omega_cdm: 0.2587481 # Cold Dark Matter density parameter Omega_lambda: 0.693 # Dark-energy density parameter Omega_b: 0.0482519 # Baryon density parameter # Parameters governing the time integration TimeIntegration: dt_min: 1e-7 # The minimal time-step size of the simulation (in internal units). dt_max: 5e-3 # The maximal time-step size of the simulation (in internal units). # Parameters governing the snapshots Snapshots: basename: stellar_evolution # Common part of the name of output files delta_time: 1.03 scale_factor_first: 0.02 compression: 4 # Parameters governing the conserved quantities statistics Statistics: scale_factor_first: 0.00991 delta_time: 1.1 # 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: 100. # Kelvin # Properties of the stars Stars: overwrite_birth_time: 1 birth_time: 0.00991 # Give the star in the ICs a decent birth time luminosity_filename: ./photometry # Parameters related to the initial conditions InitialConditions: file_name: ./stellar_evolution.hdf5 # The file to read periodic: 1 Scheduler: max_top_level_cells: 8 # 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 # Properties of the EAGLE feedback and enrichment model. This matches the EAGLE-Ref (Schaye+2015) model. EAGLEFeedback: use_SNII_feedback: 0 # Global switch for SNII thermal (stochastic) feedback. use_SNIa_feedback: 0 # Global switch for SNIa thermal (continuous) feedback. use_AGB_enrichment: 1 # Global switch for enrichement from AGB stars. use_SNII_enrichment: 1 # Global switch for enrichement from SNII stars. use_SNIa_enrichment: 1 # Global switch for enrichement from SNIa stars. filename: ./yieldtables/ # Path to the directory containing the EAGLE yield tables. IMF_min_mass_Msun: 0.1 # Minimal stellar mass considered for the Chabrier IMF in solar masses. IMF_max_mass_Msun: 100.0 # Maximal stellar mass considered for the Chabrier IMF in solar masses. SNII_min_mass_Msun: 6.0 # Minimal mass considered for SNII stars in solar masses. SNII_max_mass_Msun: 100.0 # Maximal mass considered for SNII stars in solar masses. SNII_feedback_model: Random # Feedback modes: Random, Isotropic, MinimumDistance, MinimumDensity SNII_sampled_delay: 0 # Sample the SNII lifetimes to do feedback. SNII_wind_delay_Gyr: 0.03 # Time in Gyr between a star's birth and the SNII thermal feedback event when not sampling. SNII_delta_T_K: 3.16228e7 # Change in temperature to apply to the gas particle in a SNII thermal feedback event in Kelvin. SNII_energy_erg: 1.0e51 # Energy of one SNII explosion in ergs. SNII_energy_fraction_min: 0.3 # Minimal fraction of energy applied in a SNII feedback event. SNII_energy_fraction_max: 3.0 # Maximal fraction of energy applied in a SNII feedback event. SNII_energy_fraction_Z_0: 0.0012663729 # Pivot point for the metallicity dependance of the SNII energy fraction (metal mass fraction). SNII_energy_fraction_n_0_H_p_cm3: 0.67 # Pivot point for the birth density dependance of the SNII energy fraction in cm^-3. SNII_energy_fraction_n_Z: 0.8686 # Power-law for the metallicity dependance of the SNII energy fraction. SNII_energy_fraction_n_n: 0.8686 # Power-law for the birth density dependance of the SNII energy fraction. SNII_energy_fraction_use_birth_density: 0 # Are we using the density and metallicity at birth to compute f_E or at feedback time? SNII_energy_fraction_use_birth_metallicity: 0 # Are we using the density and metallicity at birth to compute f_E or at feedback time? SNIa_DTD: Exponential # Use the EAGLE-Ref SNIa DTD. SNIa_DTD_delay_Gyr: 0.04 # Age of the most massive SNIa in Gyr. SNIa_DTD_exp_timescale_Gyr: 2.0 # Time-scale of the exponential decay of the SNIa rates in Gyr. SNIa_DTD_exp_norm_p_Msun: 0.002 # Normalisation of the SNIa rates in inverse solar masses. SNIa_energy_erg: 1.0e51 # Energy of one SNIa explosion in ergs. AGB_ejecta_velocity_km_p_s: 10.0 # Velocity of the AGB ejectas in km/s. stellar_evolution_age_cut_Gyr: 0.1 # Age in Gyr above which the enrichment is downsampled. stellar_evolution_sampling_rate: 10 # Number of time-steps in-between two enrichment events for a star above the age threshold. SNII_yield_factor_Hydrogen: 1.0 # (Optional) Correction factor to apply to the Hydrogen yield from the SNII channel. SNII_yield_factor_Helium: 1.0 # (Optional) Correction factor to apply to the Helium yield from the SNII channel. SNII_yield_factor_Carbon: 0.5 # (Optional) Correction factor to apply to the Carbon yield from the SNII channel. SNII_yield_factor_Nitrogen: 1.0 # (Optional) Correction factor to apply to the Nitrogen yield from the SNII channel. SNII_yield_factor_Oxygen: 1.0 # (Optional) Correction factor to apply to the Oxygen yield from the SNII channel. SNII_yield_factor_Neon: 1.0 # (Optional) Correction factor to apply to the Neon yield from the SNII channel. SNII_yield_factor_Magnesium: 2.0 # (Optional) Correction factor to apply to the Magnesium yield from the SNII channel. SNII_yield_factor_Silicon: 1.0 # (Optional) Correction factor to apply to the Silicon yield from the SNII channel. SNII_yield_factor_Iron: 0.5 # (Optional) Correction factor to apply to the Iron yield from the SNII channel.