diff options
Diffstat (limited to 'fg21sim/extragalactic/clusters/helper.py')
| -rw-r--r-- | fg21sim/extragalactic/clusters/helper.py | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/fg21sim/extragalactic/clusters/helper.py b/fg21sim/extragalactic/clusters/helper.py index e27d763..e9fa338 100644 --- a/fg21sim/extragalactic/clusters/helper.py +++ b/fg21sim/extragalactic/clusters/helper.py @@ -1,5 +1,5 @@ -# Copyright (c) 2017-2018 Weitian LI <weitian@aaronly.me> -# MIT license +# Copyright (c) 2017-2019 Weitian LI <wt@liwt.net> +# MIT License """ Functions to help simulate galaxy cluster diffuse emissions. @@ -137,7 +137,7 @@ def radius_virial(mass, z=0.0): return R_vir * AUC.cm2kpc # [kpc] -def radius_stripping(M_main, M_sub, z, f_rc=0.1): +def radius_stripping(M_main, M_sub, z, f_rc=0.1, beta=0.8): """ Calculate the stripping radius of the in-falling sub-cluster, which is determined by the equipartition between the static and ram pressure. @@ -152,7 +152,7 @@ def radius_stripping(M_main, M_sub, z, f_rc=0.1): """ r_vir = radius_virial(M_sub, z) # [kpc] rho_main = density_number_thermal(M_main, z) * AC.mu*AC.u # [g/cm^3] - f_rho_sub = calc_gas_density_profile(M_sub, z) # [Msun/kpc^3] + f_rho_sub = calc_gas_density_profile(M_sub, z, f_rc, beta) # [Msun/kpc^3] vi = velocity_impact(M_main, M_sub, z) # [km/s] kT_sub = kT_cluster(M_sub, z) # [keV] rhs = rho_main * vi**2 * AC.mu*AC.u / kT_sub # [g/cm^3][g*km^2/s^2/keV] @@ -344,7 +344,8 @@ def speed_sound(kT): def velocity_virial(mass, z=0.0): """ - Calculate the virial velocity, i.e., free-fall velocity. + Calculate the virial velocity, i.e., circular velocity at the + virial radius. Unit: [km/s] """ |