# Define the system of units to use internally.
InternalUnitSystem:
UnitMass_in_cgs: 1.989e43 # 10^10 M_sun in grams
UnitLength_in_cgs: 3.085678e24 # 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: 0.9090909 # 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: 1e-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-3 # The maximal time-step size of the simulation (in internal units).
Scheduler:
max_top_level_cells: 16
# Parameters governing the snapshots
Snapshots:
basename: eagle # Common part of the name of output files
scale_factor_first: 0.92 # Scale-factor of the first snaphot (cosmological run)
time_first: 0.01 # Time of the first output (non-cosmological run) (in internal units)
delta_time: 1.10 # Time difference between consecutive outputs (in internal units)
# Parameters governing the conserved quantities statistics
Statistics:
scale_factor_first: 0.92 # Scale-factor of the first stat dump (cosmological run)
time_first: 0.01 # Time of the first stat dump (non-cosmological run) (in internal units)
delta_time: 1.05 # Time between statistics output
# Parameters for the self-gravity scheme
Gravity:
eta: 0.025 # Constant dimensionless multiplier for time integration.
theta: 0.7 # Opening angle (Multipole acceptance criterion)
comoving_softening: 0.0026994 # Comoving softening length (in internal units).
max_physical_softening: 0.0007 # Physical softening length (in internal units).
mesh_side_length: 32
# 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: 100 # (internal units)
# Parameters related to the initial conditions
InitialConditions:
file_name: ./EAGLE_ICs_25.hdf5 # The file to read
cleanup_h_factors: 1 # Remove the h-factors inherited from Gadget
cleanup_velocity_factors: 1 # Remove the sqrt(a) factor in the velocities inherited from Gadget