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Support transfer function without neutrinos. #13

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Support transfer function without neutrinos. #13

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646c479
Support transfer function without neutrinos.
Sep 6, 2017
a3d09d6
Fixing stupid bug and return d_tot.
Sep 6, 2017
e29bbe4
add growth factor on DX1
Sep 27, 2017
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13 changes: 8 additions & 5 deletions fastpm/multi.py
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Original file line number Diff line number Diff line change
Expand Up @@ -73,7 +73,7 @@ def apply_density(k, v):
source1[...] += sp.Omega(a) * source
Omega_tot += sp.Omega(a)

DX1 = lpt1(source, Q)
DX1 = lpt1(source, Q)*pt.D1(a)
sp.S[...] = DX1

def apply_velocity(k, v):
Expand Down Expand Up @@ -192,23 +192,26 @@ def get_species_transfer_function_from_class(cosmology, z):
# flip the sign to meet preserve the phase of the
d['d_cdm'] = tf['d_cdm'] * -1
d['d_b'] = tf['d_b'] * -1
d['d_ncdm[0]'] = tf['d_ncdm[0]'] * -1
if getattr(tf, 'd_ncdm[0]', None) is not None:
d['d_ncdm[0]'] = tf['d_ncdm[0]'] * -1
d['d_tot'] = tf['d_tot'] * -1
if cosmology.gauge == 'newtonian':
# dtau to da, the negative sign in the 3 fluid equation of motion
# eliminated due to the flip in d
fac = 1.0 / (cosmology.hubble_function(z) * (1. + z) ** -2)
d['dd_cdm'] = tf['t_cdm'] * fac
d['dd_b'] = tf['t_b'] * fac
d['dd_ncdm[0]'] = tf['t_ncdm[0]'] * fac
if getattr(tf, 't_ncdm[0]', None) is not None:
d['dd_ncdm[0]'] = tf['t_ncdm[0]'] * fac
elif cosmology.gauge == 'synchronous':
fac = 1.0 / (cosmology.hubble_function(z) * (1. + z) ** -2)
d['dd_cdm'] = 0.5 * tf['h_prime'] * fac
d['dd_b'] = (0.5 * tf['h_prime'] + tf['t_b']) * fac
d['dd_ncdm[0]'] = (0.5 * tf['h_prime'] + tf['t_ncdm[0]']) * fac
if getattr(tf, 't_ncdm[0]', None) is not None:
d['dd_ncdm[0]'] = (0.5 * tf['h_prime'] + tf['t_ncdm[0]']) * fac

k = tf['k'].copy()
e = {}
for name in d:
e[name] = lambda k, x=tf['k'], y=d[name]: numpy.interp(k, x, y, left=0, right=0)
return e