diff options
Diffstat (limited to 'fg21sim/extragalactic/clusters')
| -rw-r--r-- | fg21sim/extragalactic/clusters/helper.py | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/fg21sim/extragalactic/clusters/helper.py b/fg21sim/extragalactic/clusters/helper.py index 618c237..1367374 100644 --- a/fg21sim/extragalactic/clusters/helper.py +++ b/fg21sim/extragalactic/clusters/helper.py @@ -21,6 +21,10 @@ References .. [cassano2012] Cassano et al. 2012, A&A, 548, A100 http://adsabs.harvard.edu/abs/2012A%26A...548A.100C + +.. [zandanel2014] + Zandanel, Pfrommer & Prada 2014, MNRAS, 438, 124 + http://adsabs.harvard.edu/abs/2014MNRAS.438..124Z """ @@ -64,8 +68,13 @@ def radius_halo(mass, z=0.0): """ Calculate the radius of (giant) radio halo for a cluster. - The halo radius is derived from the virial radius using the scaling - relation in [cassano2007]_. + The halo radius is assumed to linearly scale with the virial radius, + and is estimated by: + R_halo = R_vir / 4 + * halo radius is ~3-6 times smaller than the virial radius; + Ref.[cassano2007],Sec.(1) + * halo half radius is ~R500/4, therefore, R_halo ~ R_vir/4; + Ref.[zandanel2014],Sec.(6.2) Parameters ---------- @@ -81,17 +90,9 @@ def radius_halo(mass, z=0.0): R_halo : float Radius of the (expected) giant radio halo Unit: [kpc] - - References - ---------- - Ref.[cassano2007],Fig.(11) """ - # slope = 2.63 + np.random.normal(scale=0.5) - slope = 2.63 - # intercept = 2.3 + np.random.normal(scale=0.05) - intercept = 2.3 R_vir = radius_virial(mass=mass, z=z) # [kpc] - R_halo = 10 ** (slope * np.log10(R_vir) + intercept) + R_halo = R_vir / 4.0 # [kpc] return R_halo |