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authorAaron LI <aly@aaronly.me>2019-01-31 16:32:30 +0800
committerAaron LI <aly@aaronly.me>2019-01-31 16:32:30 +0800
commit8ca2c36300174a272ea7fbed18f084f9b5eccc47 (patch)
tree842854a33ce4d43ce4868d69cc0a9ea0cc9c1310
parentf84190254a39bf82953296b1fd97db2af59ed4a9 (diff)
downloadfg21sim-8ca2c36300174a272ea7fbed18f084f9b5eccc47.tar.bz2
clusters/helper: Add radius_cluster()
Ignore the cosmic evolution, keeping the radio halo modeling simple.
-rw-r--r--fg21sim/extragalactic/clusters/helper.py19
1 files changed, 19 insertions, 0 deletions
diff --git a/fg21sim/extragalactic/clusters/helper.py b/fg21sim/extragalactic/clusters/helper.py
index a86206f..3f7a964 100644
--- a/fg21sim/extragalactic/clusters/helper.py
+++ b/fg21sim/extragalactic/clusters/helper.py
@@ -170,6 +170,25 @@ def radius_virial(mass, z=0.0):
return radius_overdensity(mass, overdensity=Dc, z=z)
+def radius_cluster(mass, z=0):
+ """
+ Calculate the radius of the cluster.
+
+ NOTE/XXX
+ --------
+ The cosmic evolution makes the whole thing too complicated, e.g.,
+ the thermal energy density becomes more sensitive to the redshifts
+ rather than cluster mass, therefore, the magnetic field, which is
+ assumed to be correlated with the thermal energy density, increases
+ more rapidly with increasing redshifts rather than cluster mass.
+ This is not expected. So ignore the cosmic evolution for modeling
+ radio halos, keeping the things simple.
+
+ Unit: [kpc]
+ """
+ return radius_virial(mass, z=0)
+
+
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