From 3816f93f46e42bb277b076b63b353aba2026e371 Mon Sep 17 00:00:00 2001 From: Aaron LI Date: Sun, 8 Jan 2017 18:50:40 +0800 Subject: Update to use custom units.py instead of astropy's Also fix a parameter error in "formation.py" --- fg21sim/extragalactic/clusters/halo.py | 66 ++++++++++++++-------------------- 1 file changed, 26 insertions(+), 40 deletions(-) (limited to 'fg21sim/extragalactic/clusters/halo.py') diff --git a/fg21sim/extragalactic/clusters/halo.py b/fg21sim/extragalactic/clusters/halo.py index 8fd49c5..0881a88 100644 --- a/fg21sim/extragalactic/clusters/halo.py +++ b/fg21sim/extragalactic/clusters/halo.py @@ -14,14 +14,13 @@ References import logging import numpy as np -import astropy.units as au -import astropy.constants as ac import scipy.interpolate import scipy.integrate import scipy.optimize from .cosmology import Cosmology from .solver import FokkerPlanckSolver +from .units import (Units as AU, UnitConversions as AUC, Constants as AC) logger = logging.getLogger(__name__) @@ -62,21 +61,10 @@ class HaloSingle: mtree : `~MergerTree` Merging history of this cluster. """ + # Unit for electron momentum (p), thus its value is the Lorentz factor + mec = AU.mec # [g cm / s] # Merger tree (i.e., merging history) of this cluster mtree = None - # Unit for electron momentum (p), thus its value is the Lorentz factor - mec = ac.m_e.cgs.value*ac.c.cgs.value # [g cm / s] - # Mean molecular weight - # Ref.: Ettori et al, 2013, Space Science Review, 177, 119-154, Eq.(6) - mu = 0.6 - # Atomic mass unit (i.e., a.m.u.) - m_atom = ac.u.cgs.value # [g] - # Common units conversion - # TODO: move these to a separate module/class - Msun2g = au.solMass.to(au.g) - kpc2cm = au.kpc.to(au.cm) - keV2erg = au.keV.to(au.erg) - Gyr2s = au.Gyr.to(au.s) def __init__(self, M0, configs): self.M0 = M0 # [Msun] @@ -180,8 +168,8 @@ class HaloSingle: """ Dc = self.cosmo.overdensity_virial(z) rho = self.cosmo.rho_crit(z) # [g/cm^3] - R_vir = (3*mass*self.Msun2g / (4*np.pi * Dc * rho))**(1/3) # [cm] - R_vir /= self.kpc2cm # [kpc] + R_vir = (3*mass*AUC.Msun2g / (4*np.pi * Dc * rho))**(1/3) # [cm] + R_vir *= AUC.cm2kpc # [kpc] return R_vir def _radius_stripping(self, mass, M_main, z): @@ -216,8 +204,8 @@ class HaloSingle: Eq.(11) """ vi = self._velocity_impact(M_main, mass, z) * 1e5 # [cm/s] - kT = self.kT_mass(mass) * self.keV2erg # [erg] - coef = kT / (self.mu * self.m_atom * vi**2) # dimensionless + kT = self.kT_mass(mass) * AUC.keV2erg # [erg] + coef = kT / (AC.mu * AC.u * vi**2) # dimensionless rho_avg = self._density_average(M_main, z) # [g/cm^3] def equation(r): @@ -243,9 +231,9 @@ class HaloSingle: Eq.(12) """ f_baryon = self.cosmo.Ob0 / self.cosmo.Om0 - Rv = self._radius_virial(mass, z) * self.kpc2cm # [cm] + Rv = self._radius_virial(mass, z) * AUC.kpc2cm # [cm] V = (4*np.pi / 3) * Rv**3 # [cm^3] - rho = f_baryon * mass*self.Msun2g / V # [g/cm^3] + rho = f_baryon * mass*AUC.Msun2g / V # [g/cm^3] return rho def density_profile(self, r, mass, z): @@ -273,9 +261,9 @@ class HaloSingle: Eq.(13) """ f_baryon = self.cosmo.Ob0 / self.cosmo.Om0 - M_ICM = mass * f_baryon * self.Msun2g # [g] - r *= self.kpc2cm # [cm] - Rv = self._radius_virial(mass, z) * self.kpc2cm # [cm] + M_ICM = mass * f_baryon * AUC.Msun2g # [g] + r *= AUC.kpc2cm # [cm] + Rv = self._radius_virial(mass, z) * AUC.kpc2cm # [cm] rc = self._beta_rc(Rv) beta = self._beta_beta() norm = self._beta_norm(M_ICM, beta, rc, Rv) # [g/cm^3] @@ -360,11 +348,10 @@ class HaloSingle: Eq.(9) """ eta_v = 4 * (1 + M_main/M_sub) ** (1/3) - R_vir = self._radius_virial(M_main, z) * self.kpc2cm # [cm] - G = ac.G.cgs.value - vi = np.sqrt(2*G * (1-1/eta_v) * - (M_main+M_sub)*self.Msun2g / R_vir) # [cm/s] - vi /= 1e5 # [km/s] + R_vir = self._radius_virial(M_main, z) * AUC.kpc2cm # [cm] + vi = np.sqrt(2*AC.G * (1-1/eta_v) * + (M_main+M_sub)*AUC.Msun2g / R_vir) # [cm/s] + vi /= AUC.km2cm # [km/s] return vi def _time_crossing(self, M_main, M_sub, z): @@ -388,8 +375,7 @@ class HaloSingle: R_vir = self._radius_virial(M_main, z) # [kpc] vi = self._velocity_impact(M_main, M_sub, z) # [km/s] # Unit conversion coefficient: [s kpc/km] => [Gyr] - # uconv = au.kpc.to(au.km) * au.s.to(au.Gyr) - uconv = 0.9777922216731284 + uconv = AUC.kpc2km * AUC.s2Gyr time = uconv * R_vir / vi # [Gyr] return time @@ -525,7 +511,7 @@ class HaloSingle: zend_idx = zidx + 1 # coef = 2.23e-16 * self.eta_t / (self.radius_halo/500)**3 # [s^-1] - coef *= self.Gyr2s # [Gyr^-1] + coef *= AUC.Gyr2s # [Gyr^-1] chi = 0.0 for ev in mevents[zidx:zend_idx]: M_main = ev["M_main"] @@ -577,7 +563,7 @@ class HaloSingle: if not hasattr(self, "_electron_injection_rate"): e_th = self.e_thermal # [erg/cm^3] term1 = (self.injection_index-2) * self.eta_e - term2 = e_th / (self.pmin * self.mec * ac.c.cgs.value) # [cm^-3] + term2 = e_th / (self.pmin * self.mec * AC.c) # [cm^-3] term3 = 1.0 / (self.cosmo.age0 * self.pmin) # [Gyr^-1 mec^-1] Ke = term1 * term2 * term3 self._electron_injection_rate = Ke @@ -660,7 +646,7 @@ class HaloSingle: """ z = self.cosmo.redshift(t) n_th = self._n_thermal(self.M0, z) - coef = -3.3e-29 * self.Gyr2s / self.mec # [mec/Gyr] + coef = -3.3e-29 * AUC.Gyr2s / self.mec # [mec/Gyr] dpdt = coef * n_th * (1 + np.log(p/n_th) / 75) return dpdt @@ -675,7 +661,7 @@ class HaloSingle: Eq.(39) """ z = self.cosmo.redshift(t) - coef = -4.8e-4 * self.Gyr2s / self.mec # [mec/Gyr] + coef = -4.8e-4 * AUC.Gyr2s / self.mec # [mec/Gyr] dpdt = (coef * (p*self.mec)**2 * ((self.magnetic_field/3.2)**2 + (1+z)**4)) return dpdt @@ -693,9 +679,9 @@ class HaloSingle: mass = self.M0 f_baryon = self.cosmo.Ob0 / self.cosmo.Om0 kT = self.kT_mass(mass) # [keV] - N = mass * self.Msun2g * f_baryon / (self.mu * self.m_atom) - E_th = kT*self.keV2erg * N # [erg] - Rv = self._radius_virial(mass) * self.kpc2cm # [cm] + N = mass * AUC.Msun2g * f_baryon / (AC.mu * AC.u) + E_th = kT*AUC.keV2erg * N # [erg] + Rv = self._radius_virial(mass) * AUC.kpc2cm # [cm] V = (4*np.pi / 3) * Rv**3 # [cm^3] e_th = E_th / V # [erg/cm^3] return e_th @@ -717,8 +703,8 @@ class HaloSingle: Number density of the ICM (unit: cm^-3) """ f_baryon = self.cosmo.Ob0 / self.cosmo.Om0 - N = mass * self.Msun2g * f_baryon / (self.mu * self.m_atom) - Rv = self._radius_virial(mass, z) * self.kpc2cm # [cm] + N = mass * AUC.Msun2g * f_baryon / (AC.mu * AC.u) + Rv = self._radius_virial(mass, z) * AUC.kpc2cm # [cm] V = (4*np.pi / 3) * Rv**3 # [cm^3] n_th = N / V # [cm^-3] return n_th -- cgit v1.2.2