clusters/halo: calc turbulence velocity dispersion based on merger

Also update the description of option "extragalactic/halos/eta_turb"
and change its default value to 0.1

1 files changed, 3 insertions, 9 deletions

diff --git a/fg21sim/configs/20-extragalactic.conf.spec b/fg21sim/configs/20-extragalactic.conf.spec
index 44fb1ca..52f66da 100644
--- a/fg21sim/configs/20-extragalactic.conf.spec
+++ b/fg21sim/configs/20-extragalactic.conf.spec
@@ -167,17 +167,11 @@
   # used to determine the radio halo size.
   f_lturb = float(default=0.33, min=0.1, max=1.0)
 
-  # The fraction of cluster thermal energy originating from turbulent
-  # dissipation, which describes the turbulence intensity in the ICM,
-  # and determines its Mach number.
-  # NOTE: Currently, this parameter only determines the turbulence Mach
-  #       number, which affects only the turbulent acceleration efficiency,
-  #       which is also controlled by the above ``f_acc`` parameter.
-  #       So we can just *fix* this parameter to its default value.
-  eta_turb = float(default=0.2, min=0.1, max=1.0)
-
   # Ratio of the total energy injected into cosmic-ray electrons during
   # the cluster life to its total thermal energy.
+  # The fraction of merger energy transferred into the turbulence.
+  eta_turb = float(default=0.1, min=0.1, max=0.5)
+
   eta_e = float(default=0.001, min=0.001, max=0.1)
 
   # Electron injection, which is assumed to have a constant injection