pynbody.analysis.hmf.BiasedPowerSpectrum

class pynbody.analysis.hmf.BiasedPowerSpectrum(bias, pspec)

Bases: PowerSpectrum

A power spectrum object with linear bias

Methods

__call__(k)	Evaluate the power spectrum at the snapshot redshift
get_sigma8()	Calculate the current sigma8 value at z=0
set_sigma8(sigma8)	Update the normalisation for a given sigma8 value at z=0

__init__(bias, pspec)

Set up a biased power spectrum.

Parameters:

• bias (float or function) – Either a constant linear bias factor, or a function of wavenumber that returns the bias at that wavenumber.

• pspec (PowerSpectrum) – The power spectrum object to wrap with a bias

get_sigma8()

Calculate the current sigma8 value at z=0

set_sigma8(sigma8)

Update the normalisation for a given sigma8 value at z=0