Bases: Baryons
The baryonic boost factor model of
van Daalen et al. 2019,.
The boost factor is applied multiplicatively so that
\(P_{\rm bar.}(k, a) = P_{\rm DMO}(k, a)\, f_{\rm vD19}(k, a)\).
Note
The model has only been tested at z=0 and is valid for
\(k\leq 1 \,h/{\rm Mpc}\).
- Parameters:
fbar (float) – the fraction of baryons in a halo in units
of the ratio of \(\Omega_b\) to \(\Omega_m\).
Default to 0.7 which is approximately compatible with observations
(see Fig. 16 of the paper).
mass_def (string) – spherical overdensity mass definition.
Options are “500c” or “200c”.
-
name = 'vanDaalen19'
-
boost_factor(cosmo, k, a)[source]
The vD19 model boost factor for baryons.
- Parameters:
cosmo (Cosmology) – Cosmological parameters.
k (float or array) – Wavenumber (in \({\rm Mpc}^{-1}\)).
a (float or array) – Scale factor.
- Returns:
Correction factor to apply to the power spectrum.
- Return type:
float or array
-
update_parameters(fbar=None, mass_def=None)[source]
Update van Daalen 2019 parameters. All parameters set to
None will be left untouched.
- Parameters:
-