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authorAaron LI <aly@aaronly.me>2019-02-21 20:17:47 +0800
committerAaron LI <aly@aaronly.me>2019-02-21 20:17:47 +0800
commit308442d1ca1a0f56889dd60f78d2b776ace2d81b (patch)
treefab595f754fa50ae84e50e08d37da71bd6cc2991 /fg21sim/extragalactic
parent4b87e5e6af2e45b08e4cb7d36c54ba560f9517e2 (diff)
downloadfg21sim-308442d1ca1a0f56889dd60f78d2b776ace2d81b.tar.bz2
clusters/halo: Reorder the '_energy_loss()' method
Diffstat (limited to 'fg21sim/extragalactic')
-rw-r--r--fg21sim/extragalactic/clusters/halo.py54
1 files changed, 21 insertions, 33 deletions
diff --git a/fg21sim/extragalactic/clusters/halo.py b/fg21sim/extragalactic/clusters/halo.py
index 55c7ca0..e24a0c3 100644
--- a/fg21sim/extragalactic/clusters/halo.py
+++ b/fg21sim/extragalactic/clusters/halo.py
@@ -645,6 +645,27 @@ class RadioHalo1M:
(self.fp_diffusion(gamma, t) * 2 / gamma))
return advection
+ def _energy_loss(self, gamma, t):
+ """
+ Energy loss mechanisms:
+ * inverse Compton scattering off the CMB photons
+ * synchrotron radiation
+ * Coulomb collisions
+
+ Reference: Ref.[sarazin1999],Eqs.(6,7,9)
+
+ Unit: [Gyr^-1]
+ """
+ gamma = np.asarray(gamma)
+ z = COSMO.redshift(t)
+ B = self.magnetic_field(t) # [uG]
+ mass = self.mass_main(t)
+ n_th = helper.density_number_thermal(mass, z) # [cm^-3]
+ loss_ic = -4.32e-4 * gamma**2 * (1+z)**4
+ loss_syn = -4.10e-5 * gamma**2 * B**2
+ loss_coul = -3.79e4 * n_th * (1 + np.log(gamma/n_th) / 75)
+ return loss_ic + loss_syn + loss_coul
+
def _merger_time(self, t=None):
"""
The (cosmic) time when the merger begins.
@@ -723,39 +744,6 @@ class RadioHalo1M:
tau_turb = self.duration_turb(t_merger)
return (t >= t_merger) and (t <= t_merger + tau_turb)
- def _energy_loss(self, gamma, t):
- """
- Energy loss mechanisms:
- * inverse Compton scattering off the CMB photons
- * synchrotron radiation
- * Coulomb collisions
-
- Reference: Ref.[sarazin1999],Eqs.(6,7,9)
-
- Parameters
- ----------
- gamma : float, or float 1D `~numpy.ndarray`
- The Lorentz factors of electrons
- t : float
- The cosmic time/age
- Unit: [Gyr]
-
- Returns
- -------
- loss : float, or float 1D `~numpy.ndarray`
- The energy loss rates
- Unit: [Gyr^-1]
- """
- gamma = np.asarray(gamma)
- z = COSMO.redshift(t)
- B = self.magnetic_field(t) # [uG]
- mass = self.mass_main(t)
- n_th = helper.density_number_thermal(mass, z) # [cm^-3]
- loss_ic = -4.32e-4 * gamma**2 * (1+z)**4
- loss_syn = -4.10e-5 * gamma**2 * B**2
- loss_coul = -3.79e4 * n_th * (1 + np.log(gamma/n_th) / 75)
- return loss_ic + loss_syn + loss_coul
-
class RadioHaloAM(RadioHalo1M):
"""