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Commit 11e3ab0e authored by Matthieu Schaller's avatar Matthieu Schaller
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Also change the default BH/AGN parameters to a better model.

parent 1a41eb54
......@@ -181,15 +181,24 @@ EAGLEFeedback:
# EAGLE AGN model
EAGLEAGN:
subgrid_seed_mass_Msun: 1.5e5 # Black hole subgrid mass at creation time in solar masses.
max_eddington_fraction: 1.0 # Maximal allowed accretion rate in units of the Eddington rate.
eddington_fraction_for_recording: 0.1 # Record the last time BHs reached an Eddington ratio above this threshold.
with_angmom_limiter: 1 # Are we applying the Rosas-Guevara (2015) viscous time-scale reduction term?
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.
max_reposition_mass: 2e8 # Maximal BH mass considered for BH repositioning in solar masses.
threshold_major_merger: 0.333 # Mass ratio threshold to consider a BH merger as 'major'
threshold_minor_merger: 0.1 # Mass ratio threshold to consider a BH merger as 'minor'
subgrid_seed_mass_Msun: 1.5e5 # Black hole subgrid mass at creation time in solar masses.
multi_phase_bondi: 0 # Compute Bondi rates per neighbour particle?
subgrid_bondi: 0 # Compute Bondi rates using the subgrid extrapolation of the gas properties around the BH?
with_angmom_limiter: 0 # Are we applying the Rosas-Guevara et al. (2015) viscous time-scale reduction term?
viscous_alpha: 1e6 # Normalisation constant of the viscous time-scale in the accretion reduction term
radiative_efficiency: 0.1 # Fraction of the accreted mass that gets radiated.
max_eddington_fraction: 1. # Maximal allowed accretion rate in units of the Eddington rate.
eddington_fraction_for_recording: 0.1 # Record the last time BHs reached an Eddington ratio above this threshold.
coupling_efficiency: 0.1 # 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.
max_reposition_mass: 1e20 # Maximal BH mass considered for BH repositioning in solar masses (large number implies we always reposition).
max_reposition_distance_ratio: 3.0 # Maximal distance a BH can be repositioned, in units of the softening length.
with_reposition_velocity_threshold: 1 # Should we only reposition to particles that move slowly w.r.t. the black hole?
max_reposition_velocity_ratio: 0.5 # Maximal velocity offset of a particle to reposition a BH to, in units of the ambient sound speed of the BH. Only meaningful if with_reposition_velocity_ratio is 1.
min_reposition_velocity_threshold: -1.0 # Minimal value of the velocity threshold for repositioning [km/s], set to < 0 for no effect. Only meaningful if with_reposition_velocity_ratio is 1.
set_reposition_speed: 0 # Should we reposition black holes with (at most) a prescribed speed towards the potential minimum?
threshold_major_merger: 0.333 # Mass ratio threshold to consider a BH merger as 'major'
threshold_minor_merger: 0.1 # Mass ratio threshold to consider a BH merger as 'minor'
merger_threshold_type: 2 # Type of velocity threshold for BH mergers (0: v_circ at kernel edge, 1: v_esc at actual distance, with softening, 2: v_esc at actual distance, no softening).
merger_max_distance_ratio: 3.0 # Maximal distance over which two BHs can merge, in units of the softening length.
......@@ -206,15 +206,15 @@ EAGLEAGN:
subgrid_seed_mass_Msun: 1.5e5 # Black hole subgrid mass at creation time in solar masses.
multi_phase_bondi: 0 # Compute Bondi rates per neighbour particle?
subgrid_bondi: 0 # Compute Bondi rates using the subgrid extrapolation of the gas properties around the BH?
with_angmom_limiter: 1 # Are we applying the Rosas-Guevara et al. (2015) viscous time-scale reduction term?
with_angmom_limiter: 0 # Are we applying the Rosas-Guevara et al. (2015) viscous time-scale reduction term?
viscous_alpha: 1e6 # Normalisation constant of the viscous time-scale in the accretion reduction term
radiative_efficiency: 0.1 # Fraction of the accreted mass that gets radiated.
max_eddington_fraction: 1. # Maximal allowed accretion rate in units of the Eddington rate.
eddington_fraction_for_recording: 0.1 # Record the last time BHs reached an Eddington ratio above this threshold.
coupling_efficiency: 0.15 # Fraction of the radiated energy that couples to the gas in feedback events.
coupling_efficiency: 0.1 # 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.
max_reposition_mass: 2e8 # Maximal BH mass considered for BH repositioning in solar masses.
max_reposition_mass: 1e20 # Maximal BH mass considered for BH repositioning in solar masses (large number implies we always reposition).
max_reposition_distance_ratio: 3.0 # Maximal distance a BH can be repositioned, in units of the softening length.
with_reposition_velocity_threshold: 1 # Should we only reposition to particles that move slowly w.r.t. the black hole?
max_reposition_velocity_ratio: 0.5 # Maximal velocity offset of a particle to reposition a BH to, in units of the ambient sound speed of the BH. Only meaningful if with_reposition_velocity_ratio is 1.
......
......@@ -206,15 +206,15 @@ EAGLEAGN:
subgrid_seed_mass_Msun: 1.5e5 # Black hole subgrid mass at creation time in solar masses.
multi_phase_bondi: 0 # Compute Bondi rates per neighbour particle?
subgrid_bondi: 0 # Compute Bondi rates using the subgrid extrapolation of the gas properties around the BH?
with_angmom_limiter: 1 # Are we applying the Rosas-Guevara et al. (2015) viscous time-scale reduction term?
with_angmom_limiter: 0 # Are we applying the Rosas-Guevara et al. (2015) viscous time-scale reduction term?
viscous_alpha: 1e6 # Normalisation constant of the viscous time-scale in the accretion reduction term
radiative_efficiency: 0.1 # Fraction of the accreted mass that gets radiated.
max_eddington_fraction: 1. # Maximal allowed accretion rate in units of the Eddington rate.
eddington_fraction_for_recording: 0.1 # Record the last time BHs reached an Eddington ratio above this threshold.
coupling_efficiency: 0.15 # Fraction of the radiated energy that couples to the gas in feedback events.
coupling_efficiency: 0.1 # 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.
max_reposition_mass: 2e8 # Maximal BH mass considered for BH repositioning in solar masses.
max_reposition_mass: 1e20 # Maximal BH mass considered for BH repositioning in solar masses (large number implies we always reposition).
max_reposition_distance_ratio: 3.0 # Maximal distance a BH can be repositioned, in units of the softening length.
with_reposition_velocity_threshold: 1 # Should we only reposition to particles that move slowly w.r.t. the black hole?
max_reposition_velocity_ratio: 0.5 # Maximal velocity offset of a particle to reposition a BH to, in units of the ambient sound speed of the BH. Only meaningful if with_reposition_velocity_ratio is 1.
......
......@@ -204,15 +204,15 @@ EAGLEAGN:
subgrid_seed_mass_Msun: 1.5e5 # Black hole subgrid mass at creation time in solar masses.
multi_phase_bondi: 0 # Compute Bondi rates per neighbour particle?
subgrid_bondi: 0 # Compute Bondi rates using the subgrid extrapolation of the gas properties around the BH?
with_angmom_limiter: 1 # Are we applying the Rosas-Guevara et al. (2015) viscous time-scale reduction term?
with_angmom_limiter: 0 # Are we applying the Rosas-Guevara et al. (2015) viscous time-scale reduction term?
viscous_alpha: 1e6 # Normalisation constant of the viscous time-scale in the accretion reduction term
radiative_efficiency: 0.1 # Fraction of the accreted mass that gets radiated.
max_eddington_fraction: 1. # Maximal allowed accretion rate in units of the Eddington rate.
eddington_fraction_for_recording: 0.1 # Record the last time BHs reached an Eddington ratio above this threshold.
coupling_efficiency: 0.15 # Fraction of the radiated energy that couples to the gas in feedback events.
coupling_efficiency: 0.1 # 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.
max_reposition_mass: 2e8 # Maximal BH mass considered for BH repositioning in solar masses.
max_reposition_mass: 1e20 # Maximal BH mass considered for BH repositioning in solar masses (large number implies we always reposition).
max_reposition_distance_ratio: 3.0 # Maximal distance a BH can be repositioned, in units of the softening length.
with_reposition_velocity_threshold: 1 # Should we only reposition to particles that move slowly w.r.t. the black hole?
max_reposition_velocity_ratio: 0.5 # Maximal velocity offset of a particle to reposition a BH to, in units of the ambient sound speed of the BH. Only meaningful if with_reposition_velocity_ratio is 1.
......
......@@ -203,15 +203,15 @@ EAGLEAGN:
subgrid_seed_mass_Msun: 1.5e5 # Black hole subgrid mass at creation time in solar masses.
multi_phase_bondi: 0 # Compute Bondi rates per neighbour particle?
subgrid_bondi: 0 # Compute Bondi rates using the subgrid extrapolation of the gas properties around the BH?
with_angmom_limiter: 1 # Are we applying the Rosas-Guevara et al. (2015) viscous time-scale reduction term?
with_angmom_limiter: 0 # Are we applying the Rosas-Guevara et al. (2015) viscous time-scale reduction term?
viscous_alpha: 1e6 # Normalisation constant of the viscous time-scale in the accretion reduction term
radiative_efficiency: 0.1 # Fraction of the accreted mass that gets radiated.
max_eddington_fraction: 1. # Maximal allowed accretion rate in units of the Eddington rate.
eddington_fraction_for_recording: 0.1 # Record the last time BHs reached an Eddington ratio above this threshold.
coupling_efficiency: 0.15 # Fraction of the radiated energy that couples to the gas in feedback events.
coupling_efficiency: 0.1 # 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.
max_reposition_mass: 2e8 # Maximal BH mass considered for BH repositioning in solar masses.
max_reposition_mass: 1e20 # Maximal BH mass considered for BH repositioning in solar masses (large number implies we always reposition).
max_reposition_distance_ratio: 3.0 # Maximal distance a BH can be repositioned, in units of the softening length.
with_reposition_velocity_threshold: 1 # Should we only reposition to particles that move slowly w.r.t. the black hole?
max_reposition_velocity_ratio: 0.5 # Maximal velocity offset of a particle to reposition a BH to, in units of the ambient sound speed of the BH. Only meaningful if with_reposition_velocity_ratio is 1.
......
......@@ -206,15 +206,15 @@ EAGLEAGN:
subgrid_seed_mass_Msun: 1.5e5 # Black hole subgrid mass at creation time in solar masses.
multi_phase_bondi: 0 # Compute Bondi rates per neighbour particle?
subgrid_bondi: 0 # Compute Bondi rates using the subgrid extrapolation of the gas properties around the BH?
with_angmom_limiter: 1 # Are we applying the Rosas-Guevara et al. (2015) viscous time-scale reduction term?
with_angmom_limiter: 0 # Are we applying the Rosas-Guevara et al. (2015) viscous time-scale reduction term?
viscous_alpha: 1e6 # Normalisation constant of the viscous time-scale in the accretion reduction term
radiative_efficiency: 0.1 # Fraction of the accreted mass that gets radiated.
max_eddington_fraction: 1. # Maximal allowed accretion rate in units of the Eddington rate.
eddington_fraction_for_recording: 0.1 # Record the last time BHs reached an Eddington ratio above this threshold.
coupling_efficiency: 0.15 # Fraction of the radiated energy that couples to the gas in feedback events.
coupling_efficiency: 0.1 # 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.
max_reposition_mass: 2e8 # Maximal BH mass considered for BH repositioning in solar masses.
max_reposition_mass: 1e20 # Maximal BH mass considered for BH repositioning in solar masses (large number implies we always reposition).
max_reposition_distance_ratio: 3.0 # Maximal distance a BH can be repositioned, in units of the softening length.
with_reposition_velocity_threshold: 1 # Should we only reposition to particles that move slowly w.r.t. the black hole?
max_reposition_velocity_ratio: 0.5 # Maximal velocity offset of a particle to reposition a BH to, in units of the ambient sound speed of the BH. Only meaningful if with_reposition_velocity_ratio is 1.
......
......@@ -54,6 +54,11 @@ the following changes have been made (at standard resolution):
length any more.
- The BHs can reposition only onto gas particles and not onto any
type as before.
- BHs of all masses can be repositioned (was limited to
M_BH < 1.8*10^8 Msun).
- The angular momentum term in the BH accretion model of
Rosas-Guevara et al. (2015) is now switched off.
- The coupling efficency of the BH feedback is now 0.1 (was 0.15).
- The maximal relative velocity between a BH and gas particle
eligible to be a reposition target has been increased to 0.5 times
the local sound-speed around the BH (was 0.25 * c_sound).
......
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