ps_line_pt.c File Reference

Documented computation of Poisson shot noise and tree-level line power spectrum in real and redshift-space. More...

#include "header.h"

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Functions
double	PS_tot_interloper (struct Cosmology *Cx, double k, double mu, double z_s, double z_inter, size_t line_id)
	Compute the 3D power spectrum of interloper line power spectrum in unit of micro K^2 Mpc^3. More...
double	PS_line_real (struct Cosmology *Cx, double k, double z, size_t line_id)
	Compute the real-space 3D power spectrum of emission lines in unit of micro K^2 Mpc^3. More...
double	PS_line_RSD (struct Cosmology *Cx, struct Cosmology *Cx_ref, double k, double mu, double z, size_t line_id)
	Compute the redshift-space 3D power spectrum of emission lines in unit of micro K^2 Mpc^3 as a function of wavenumber and angle w.r.t. More...
int	ps_line_multipoles_integrand (unsigned ndim, const double *x, void *p, unsigned fdim, double *fvalue)
	The integrand function passed to hcubature integrator to compute the line power spectrum multipoles. More...
double	ps_line_multipoles (struct Cosmology *Cx, struct Cosmology *Cx_ref, double k, double z, size_t line_id, int ell)
	Compute the multipole moments of redshift-space power spectrum of emission lines in unit of micro K^2 Mpc^3, integrating over the angle w.r.t LOS, weighted by. More...
double	PS_shot (struct Cosmology *Cx, double z, size_t line_id)
	Compute the Poisson shot noise in unit of micro K^2 Mpc^3. More...

Detailed Description

Documented computation of Poisson shot noise and tree-level line power spectrum in real and redshift-space.

Azadeh Moradinezhad Dizgah, November 4th 2021

NOTE TODO: Add the 1loop redshift-space power spectrum of the line. This requires implementing FFTLog, still in progress For the moment we stick to the tree-level expression of line power spectrum in redshift-space.

In summary, the following functions can be called from other modules:

1. PS_tot_interloper() computes power spectrum of interlopers (tree-level with RSD)
2. PS_line_real() computes tree-level line power spectrum in real-space
3. PS_line_RSD() computes the tree-level line power spectrum in redshift-space, as a function of wavenumber and angle w.r.t LOS
4. ps_line_multipoles() computes the redshift-space multipoles of the line power spectrum
5. PS_shot() computes the poisson shot noise

Function Documentation

ps_line_multipoles()

double ps_line_multipoles	(	struct Cosmology *	Cx,
		struct Cosmology *	Cx_ref,
		double	k,
		double	z,
		size_t	line_id,
		int	ell
	)

Compute the multipole moments of redshift-space power spectrum of emission lines in unit of micro K^2 Mpc^3, integrating over the angle w.r.t LOS, weighted by.

Parameters

Cx	Input: Cosmology structure
Cx_ref	Input: Reference cosmology structure, needed for AP effect
k	Input: wavenumber in unit of 1/Mpc.
z	Input: redshift
line_id	Inpute: id of the line to be considered.
ell	Inpute: the multipole

Returns

P_ell(k)

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ps_line_multipoles_integrand()

int ps_line_multipoles_integrand	(	unsigned	ndim,
		const double *	x,
		void *	p,
		unsigned	fdim,
		double *	fvalue
	)

The integrand function passed to hcubature integrator to compute the line power spectrum multipoles.

Parameters

ndim	Input: Dimensionality of the domain of integration
x	Input: integration variable
p	Input: integration parmaeters
fdim	Input: Dimensionality of the integrand function
fvalue	Input: Array of values of the integrand of dimension fdim return the error status

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PS_line_real()

double PS_line_real	(	struct Cosmology *	Cx,
		double	k,
		double	z,
		size_t	line_id
	)

Compute the real-space 3D power spectrum of emission lines in unit of micro K^2 Mpc^3.

Parameters

Cx	Input: Cosmology structure
k	Input: wavenumber in unit of 1/Mpc.
z	Input: redshift
line_id	Inpute: id of the line to be considered.

Returns

tree-level P_clust(k)

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PS_line_RSD()

double PS_line_RSD	(	struct Cosmology *	Cx,
		struct Cosmology *	Cx_ref,
		double	k,
		double	mu,
		double	z,
		size_t	line_id
	)

Compute the redshift-space 3D power spectrum of emission lines in unit of micro K^2 Mpc^3 as a function of wavenumber and angle w.r.t.

LOS

Parameters

Cx	Input: Cosmology structure
Cx_ref	Input: Reference cosmology structure, needed for AP effect
k	Input: wavenumber in unit of 1/Mpc.
mu	Inpute: angle w.r.t LOS
z	Input: redshift
line_id	Inpute: id of the line to be considered.

Returns

tree-level P_clust(k,mu)

to plot the power spectrum in units of micro K^2 Mpc^3

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PS_shot()

double PS_shot	(	struct Cosmology *	Cx,
		double	z,
		size_t	line_id
	)

Compute the Poisson shot noise in unit of micro K^2 Mpc^3.

Parameters

Cx	Input: Cosmology structure
z	Input: redshift
line_id	Inpute: id of the line to be considered.

Returns

P_poisson
in unit of micro K^2 Mpc^3

Boltzmann constant in unit of erg K^-1

in unit of erg/s

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PS_tot_interloper()

double PS_tot_interloper	(	struct Cosmology *	Cx,
		double	k,
		double	mu,
		double	z_s,
		double	z_inter,
		size_t	line_id
	)

Compute the 3D power spectrum of interloper line power spectrum in unit of micro K^2 Mpc^3.

Parameters

Cx	Input: Cosmology structure
k	Input: wavenumber in unit of 1/Mpc.
mu	Input: cos of the angle w.r.t. LOS
z_s	Input: redshift of the signal line
z_inter	Input: redshift of the interloper line
line_id	Inpute: id of the line to be considered.

Returns

tree-level P_clust(k)

to plot the power spectrum in units of micro K^2 Mpc^3

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