diff options
Diffstat (limited to 'fg21sim')
| -rw-r--r-- | fg21sim/extragalactic/clusters/helper.py | 45 |
1 files changed, 13 insertions, 32 deletions
diff --git a/fg21sim/extragalactic/clusters/helper.py b/fg21sim/extragalactic/clusters/helper.py index 949838e..8edc6ec 100644 --- a/fg21sim/extragalactic/clusters/helper.py +++ b/fg21sim/extragalactic/clusters/helper.py @@ -119,7 +119,7 @@ def calc_gas_density_profile(mass, z, f_rc=0.1, beta=0.8): return beta_model(rho0, rc, beta) -def radius_overdensity(mass, overdensity, z=0.0): +def radius_overdensity(mass, overdensity, z=0): """ Calculate the radius within which the mean density is ``overdensity`` times of the cosmological critical density. @@ -134,7 +134,7 @@ def radius_overdensity(mass, overdensity, z=0.0): e.g., 200, 500. z : float, `~numpy.ndarray`, optional Redshift - Default: 0.0 (i.e., present day) + Default: 0 (i.e., present day) Returns ------- @@ -146,7 +146,7 @@ def radius_overdensity(mass, overdensity, z=0.0): return r * AUC.cm2kpc # [kpc] -def radius_virial(mass, z=0.0): +def radius_virial(mass, z=0): """ Calculate the virial radius of a cluster at a given redshift. @@ -157,7 +157,7 @@ def radius_virial(mass, z=0.0): Unit: [Msun] z : float, `~numpy.ndarray`, optional Redshift - Default: 0.0 (i.e., present day) + Default: 0 (i.e., present day) Returns ------- @@ -217,7 +217,7 @@ def radius_stripping(M_main, M_sub, z, f_rc=0.1, beta=0.8): return rs # [kpc] -def kT_virial(mass, z=0.0, radius=None): +def kT_virial(mass, z=0, radius=None): """ Calculate the virial temperature of a cluster. @@ -247,7 +247,7 @@ def kT_virial(mass, z=0.0, radius=None): return kT -def kT_cluster(mass, z=0.0, radius=None, kT_out=0): +def kT_cluster(mass, z=0, radius=None, kT_out=0): """ Calculate the temperature of a cluster ICM. @@ -274,15 +274,10 @@ def kT_cluster(mass, z=0.0, radius=None, kT_out=0): return kT_icm -def density_number_thermal(mass, z=0.0): +def density_number_thermal(mass, z=0): """ Calculate the number density of the ICM thermal plasma. - NOTE - ---- - This number density is independent of cluster (virial) mass, - but (mostly) increases with redshifts. - Parameters ---------- mass : float @@ -304,7 +299,7 @@ def density_number_thermal(mass, z=0.0): return n_th -def density_gas(mass, z=0.0): +def density_gas(mass, z=0): """ Calculate the mean gas density. Unit: [g/cm^3] @@ -312,7 +307,7 @@ def density_gas(mass, z=0.0): return density_number_thermal(mass, z) * AC.mu*AC.u # [g/cm^3] -def density_energy_thermal(mass, z=0.0, kT_out=0): +def density_energy_thermal(mass, z=0, kT_out=0): """ Calculate the thermal energy density of the ICM. @@ -428,7 +423,7 @@ def speed_sound(kT): return cs * AUC.cm2km # [km/s] -def velocity_virial(mass, z=0.0): +def velocity_virial(mass, z=0): """ Calculate the virial velocity, i.e., circular velocity at the virial radius. @@ -440,28 +435,14 @@ def velocity_virial(mass, z=0.0): return vv / AUC.km2cm # [km/s] -def velocity_impact(M_main, M_sub, z=0.0): +def velocity_impact(M_main, M_sub, z=0): """ Estimate the relative impact velocity between the two merging clusters when they are at a distance of the virial radius. - Parameters - ---------- - M_main, M_sub : float - Total (virial) masses of the main and sub clusters - Unit: [Msun] - z : float, optional - Redshift - - Returns - ------- - vi : float - Relative impact velocity - Unit: [km/s] + Reference: Ref.[cassano2005],Eq.(9) - References - ---------- - Ref.[cassano2005],Eq.(9) + Unit: [km/s] """ eta_v = 4 * (1 + M_main/M_sub) ** (1/3) R_vir = radius_cluster(M_main, z) * AUC.kpc2cm # [cm] |