MetaData:
  run_name:   EAGLE-L0100N1504-Ref

# 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:        0.9090909     # Initial scale-factor of the simulation
  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:
  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-12 # The minimal time-step size of the simulation (in internal units).
  dt_max:     1e-2  # The maximal time-step size of the simulation (in internal units).

Scheduler:
  max_top_level_cells: 32

# Parameters governing the snapshots
Snapshots:
  basename:            eagle # Common part of the name of output files
  scale_factor_first:  0.91  # 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:          1.01  # Time difference between consecutive outputs (in internal units)
  recording_triggers_part: [1.0227e-4, 1.0227e-5]   # Recording starts 100M and 10M years before a snapshot
  recording_triggers_bpart: [1.0227e-4, 1.0227e-5]  # Recording starts 100M and 10M years before a snapshot

# 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.
  MAC:                      adaptive
  epsilon_fmm:              0.001
  theta_cr:                 0.7       # Opening angle (Multipole acceptance criterion)
  mesh_side_length:         1024
  comoving_DM_softening:         0.0026994 # Comoving DM softening length (in internal units).
  max_physical_DM_softening:     0.0007    # Max physical DM softening length (in internal units).
  comoving_baryon_softening:     0.0026994 # Comoving DM softening length (in internal units).
  max_physical_baryon_softening: 0.0007    # Max physical DM softening length (in internal units).

# 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).
  h_min_ratio:           0.1      # Minimal smoothing in units of softening.
  h_max:                 0.5      # Maximal softening in co-moving internal units.
  CFL_condition:         0.2      # Courant-Friedrich-Levy condition for time integration.
  minimal_temperature:   100      # (internal units)
  overwrite_birth_time:  1
  birth_time:            0.33333  # Pretend all the stars were born at z = 2

# Parameters of the stars neighbour search
Stars:
  resolution_eta:        1.1642   # Target smoothing length in units of the mean inter-particle separation
  h_tolerance:           7e-3
  luminosity_filename:   ./photometry

# Parameters related to the initial conditions
InitialConditions:
  file_name:  ./EAGLE_ICs_100.hdf5   # The file to read
  periodic:   1
  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

