apply_astrophysical_biases

Apply various astrophysical biases to the matter power spectrum P(k,z)

File	shear/apply_astrophysical_biases/interface.so
Attribution	CosmoSIS team
	Simon Samuroff
URL

Measurement of the matter power spectrum from real data relies on the visible positions and shapes of galaxies. Real galaxies offer a window onto the underlying mass distribution but an imperfect one. Due to a variety of astrophysical processes in their formation and interaction history, the visible mass of galaxies is offset from the dark matter. Additionally, the precise relationship between their shapes and the total mass is dependent on the details of how galaxies obtain intrinsic ellipticities. One can parameterise ignorance of these processes using a series of scale and time dependent biases, which map the matter power spectrum onto the observable fields.

This module applies galaxy biases and intrinsic alignments together to generate new 3D spectra.

Assumptions

None

Setup Parameters

Name	Type	Default	Description
intrinsic_alignments	bool	True	Whether to calculate intrisic alignment spectra
galaxy_bias	bool	True	Whether to calculate galaxy position spectra.
verbosity	int	1	Parameter setting the level of terminal output

Input values

Section	Name	Type	Default	Description
matter_power_nl	z	real 1d		Redshift values of P(k,z) samples
	k_h	real 1d		Wavenumber k values of P(k,z) samples in Mpc/h
	P_k	real 2d		Non-linear matter power spectrum at samples in (Mpc/h)^{-3}
intrinsic_alignment_parameters	z	real 1d		Redshift values of P(k,z) samples
	k_h	real 1d		Wavenumber k values of P(k,z) samples in Mpc/h
	b_I	real 2d		Intrinsic alignment bias on grid
	r_I	real 2d		Stochastic intrinsic alignment bias
bias_field	z	real 1d		Redshift values of P(k,z) samples
	k_h	real 1d		Wavenumber k values of P(k,z) samples in Mpc/h
	b_g	real 2d		Galaxy bias on grid
	r_g	real 2d		Stochastic galaxy bias on grid

Output values

Output values

Section	Name	Type	Description
ia_spectrum_ii	z	real 1d	Redshift values of P(k,z) samples
	k_h	real 1d	Wavenumber k values of P(k,z) samples in Mpc/h
	P_II	real 2d	Intrinsic-intrinsic shape spectrum at samples in (Mpc/h)^{-3}
ia_spectrum_gi	z	real 1d	Redshift values of P(k,z) samples
	k_h	real 1d	k values of P(k,z) samples in Mpc/h
	P_GI	real 2d	Mass-intrinsic shape spectrum at samples in (Mpc/h)^{-3}
matter_power_gal_mass	z	real 1d	Redshift values of P(k,z) samples
	k_h	real 1d	Wavenumber k values of P(k,z) samples in Mpc/h
	P_k	real 2d	; galaxy position-mass spectrum at samples in (Mpc/h)^{-3}
matter_power_gal	z	real 1d	Redshift values of P(k,z) samples
	k_h	real 1d	Wavenumber k values of P(k,z) samples in Mpc/h
	P_k	real 2d	Galaxy position-position spectrum at samples in (Mpc/h)^{-3}
matter_power_gal_intrinsic	z	real 1d	Redshift values of P(k,z) samples
	k_h	real 1d	Wavenumber k values of P(k,z) samples in Mpc/h
	P_k	real 2d	Fourier space correlation between galaxy position and intrinsic shape in (Mpc/h)^{-3}