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| author | Aaron LI <aly@aaronly.me> | 2017-10-26 20:53:45 +0800 |
|---|---|---|
| committer | Aaron LI <aly@aaronly.me> | 2017-10-26 20:53:45 +0800 |
| commit | e3c07b150cb9ae18c0b8ba895631bd0c5f176651 (patch) | |
| tree | f8c5bf729ab6d0a55db6400d36e0c21dd0df28ca | |
| parent | 0c37caca18d9a96216db766dcf593fa8bd5063ec (diff) | |
| download | fg21sim-e3c07b150cb9ae18c0b8ba895631bd0c5f176651.tar.bz2 | |
clusters/configs: Update f_acc default to 1.0; also update descriptions
| -rw-r--r-- | fg21sim/configs/20-extragalactic.conf.spec | 8 | ||||
| -rw-r--r-- | fg21sim/extragalactic/clusters/halo.py | 2 |
2 files changed, 8 insertions, 2 deletions
diff --git a/fg21sim/configs/20-extragalactic.conf.spec b/fg21sim/configs/20-extragalactic.conf.spec index a6f5eb7..664ce0e 100644 --- a/fg21sim/configs/20-extragalactic.conf.spec +++ b/fg21sim/configs/20-extragalactic.conf.spec @@ -154,11 +154,17 @@ # The custom option to tune the turbulent acceleration timescale, which # controls the relativistic particle acceleration efficiencies. - f_acc = float(default=1.5, min=0.1, max=10) + # NOTE: The smaller this parameter, the shorter the acceleration + # timescale, therefore the more efficient the turbulent acceleration. + f_acc = float(default=1.0, min=0.1, max=10) # 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 diff --git a/fg21sim/extragalactic/clusters/halo.py b/fg21sim/extragalactic/clusters/halo.py index 78ecbae..160ab96 100644 --- a/fg21sim/extragalactic/clusters/halo.py +++ b/fg21sim/extragalactic/clusters/halo.py @@ -315,7 +315,7 @@ class RadioHalo: α is a parameter ranges about 1.5-3, and we take it as: α = 3^(3/2) / 2 ≅ 2.6 η_turb describes the fraction of thermal energy originating from - turbulent dissipation, ~0.3. + turbulent dissipation, ~0.2-0.4. Reference: Ref.[miniati2015],Eq.(1) """ |