nbodykit.cosmology.power.halofit¶

Classes

class nbodykit.cosmology.power.halofit.HalofitPower(cosmo, redshift)[source]¶

Nonlinear power spectrum computed using HaloFit via CLASS.

Parameters:	cosmo (Cosmology, astropy.cosmology.FLRW) – the Cosmology instance; astropy cosmology objects are automatically converted redshift (float) – the redshift of the power spectrum

cosmo¶

class:Cosmology – the object giving the cosmological parameters

sigma8¶

float – the z=0 amplitude of matter fluctuations

redshift¶

float – the redshift to compute the power at

Attributes

attrs	The meta-data dictionary
sigma8	The amplitude of matter fluctuations at \(z=0\).

Methods

__call__(k)

Return the power in units of \(h^{-3} \mathrm{Mpc}^3\).

__call__(k)[source]¶

Return the power in units of \(h^{-3} \mathrm{Mpc}^3\).

Parameters:	k (float, array_like) – the wavenumbers in units of \(h \mathrm{Mpc}^{-1}\)
Returns:	Pk – the linear power spectrum evaluated at k in units of \(h^{-3} \mathrm{Mpc}^3\)
Return type:	float, array_like

attrs¶

The meta-data dictionary

sigma8

The amplitude of matter fluctuations at \(z=0\).