"""Definitions for the `Synchrotron` class."""
from math import pi
import numpy as np
from astropy import constants as c
from astropy import units as u
from mosfit.constants import FOUR_PI
from mosfit.modules.seds.sed import SED
# Important: Only define one ``Module`` class per file.
[docs]class Synchrotron(SED):
"""Synchrotron spectral energy distribution."""
C_CONST = c.c.cgs.value
FLUX_CONST = FOUR_PI * (2.0 * c.h / (c.c ** 2) * pi).cgs.value
X_CONST = (c.h / c.k_B).cgs.value
STEF_CONST = (4.0 * pi * c.sigma_sb).cgs.value
ANG_CGS = u.Angstrom.cgs.scale
[docs] def process(self, **kwargs):
"""Process module."""
kwargs = self.prepare_input(self.key('luminosities'), **kwargs)
self._luminosities = kwargs[self.key('luminosities')]
self._bands = kwargs['all_bands']
self._band_indices = kwargs['all_band_indices']
self._frequencies = kwargs['all_frequencies']
self._radius_source = kwargs[self.key(self.key('radiussource'))]
self._nu_max = kwargs[self.key(self.key('numax'))]
self._p = kwargs[self.key(self.key('p'))]
self._f0 = kwargs[self.key(self.key('f0'))]
cc = self.C_CONST
ac = self.ANG_CGS
zp1 = 1.0 + kwargs[self.key(self.key('redshift'))]
seds = []
for li, lum in enumerate(self._luminosities):
bi = self._band_indices[li]
if lum == 0.0:
if bi >= 0:
seds.append(np.zeros_like(self._sample_frequencies[bi]))
else:
seds.append([0.0])
continue
if bi >= 0:
rest_freqs = self._sample_frequencies[bi] * zp1
else:
rest_freqs = [self._frequencies[li] * zp1]
# Below is not scaled properly, just proof of concept
fmax = self._f0 * self._radius_source ** 2 * self._nu_max ** 2.5
sed = [
self._f0 * self._radius_source ** 2 * (x / self._nu_max) **
2.5 * ac / cc * x ** 2 if x < self._nu_max
else fmax * (x / self._nu_max) ** (-(self._p - 1.0) / 2.0) *
ac / cc * x ** 2 for x in rest_freqs
]
sed = np.nan_to_num(sed)
seds.append(sed)
seds = self.add_to_existing_seds(seds, **kwargs)
# Units of `seds` is ergs / s / Angstrom.
return {'sample_wavelengths': self._sample_wavelengths,
self.key('seds'): seds}