Class containing basic functions required for Cosmology. More...

#include <cosmo.hpp>

Public Member Functions
void	set_up (double, double)
	This function sets the cosmological parameter values for the Cosmo functions. More...

double	angdidis (double)
	This function calculates the angular diameter distance d_A as a function of z, Omega_M and Omega_L in a matter-dominated universe, using the function propmotdis(). More...

double	angdidis2 (double, double)
	This function calculates the angular diameter distance d_A from z1 to z2 as a function of Omega_M and Omega_L in a matter-dominated universe, using the function propmotdis(). More...

double	comdis (double)
	This function calculates the line-of-sight comoving distance d_C as a function of z, Omega_M and Omega_L in a matter-dominated universe, using dcomdisdz(). More...

double	comvol (double)
	This function calculates the all-sky comoving volume V as a function of z, Omega_M and Omega_L in a matter-dominated universe. More...

double	dcomdisdz (double)
	This function calculates the differential line-of-sight comoving distance dD_c/dz as a function of z, Omega_M and Omega_L in a matter-dominated universe. More...

double	dcomvoldz (double)
	This function calculates the one-steradian differential comoving volume dV/dz as a function of z, Omega_M and Omega_L in a matter-dominated universe. More...

double	dlookbackdz (double)
	This function calculates the change in lookback time dt/dz with redshift z as a function of z, Omega_M and Omega_L in a matter-dominated universe. More...

double	doptdepthdz (double)
	This function calculates the change in optical depth dtau/dz with redshift z as a function of z, Omega_M and Omega_L in a matter-dominated universe. More...

double	dpropmotdisdz (double)
	This function calculates the derivative of the proper motion distance d_M with respect to redshift z as a function of z, Omega_M and Omega_L in a matter-dominated universe. More...

double	intcomvol (double)
	This function calculates the all-sky comoving volume V as a function of z, Omega_M and Omega_L in a matter-dominated universe by integrating dcomvoldz(). More...

double	lookback (double)
	This function calculates the lookback time t(0)-t(z) as a function of z, OmegaM and OmegaL by integrating the output of dlookbackdz. More...

double	lumdis (double)
	This function calculates the luminosity distance d_L as a function of z, Omega_M and Omega_L in a matter-dominated universe, using the function propmotdis(). More...

double	optdepth (double)
	This function calculates the optical depth tau as a function of z, OmegaM and OmegaL by integrating the output of doptdepthdz. More...

double	propmotdis (double)
	This function calculates the proper motion distance d_M as a function of z, Omega_M and Omega_L in a matter-dominated universe. More...

Public Attributes
double	OmegaM
	Matter density parameter value. More...

double	OmegaL
	Dark energy density parameter value. More...

Detailed Description

Class containing basic functions required for Cosmology.

This class encompasses a selection of functions that perform some basic calculations required for cosmology.

Member Function Documentation

◆ angdidis()

double Cosmo::angdidis ( double z )

This function calculates the angular diameter distance d_A as a function of z, Omega_M and Omega_L in a matter-dominated universe, using the function propmotdis().

H0=c=1.

◆ angdidis2()

double Cosmo::angdidis2	(	double	z1,
		double	z2
	)

This function calculates the angular diameter distance d_A from z1 to z2 as a function of Omega_M and Omega_L in a matter-dominated universe, using the function propmotdis().

H0=c=1.

◆ comdis()

double Cosmo::comdis ( double z )

This function calculates the line-of-sight comoving distance d_C as a function of z, Omega_M and Omega_L in a matter-dominated universe, using dcomdisdz().

H0=c=1.

◆ comvol()

double Cosmo::comvol ( double z )

This function calculates the all-sky comoving volume V as a function of z, Omega_M and Omega_L in a matter-dominated universe.

Formulae from Carrol, Press & Turner, 1992, and my own calculation.

◆ dcomdisdz()

double Cosmo::dcomdisdz ( double z )

This function calculates the differential line-of-sight comoving distance dD_c/dz as a function of z, Omega_M and Omega_L in a matter-dominated universe.

H0=c=1.

◆ dcomvoldz()

double Cosmo::dcomvoldz ( double z )

This function calculates the one-steradian differential comoving volume dV/dz as a function of z, Omega_M and Omega_L in a matter-dominated universe.

Formulae from Carrol, Press & Turner, 1992, Kolb & Turner, 1990, and my own calculation. H0=c=1.

◆ dlookbackdz()

double Cosmo::dlookbackdz ( double z )

This function calculates the change in lookback time dt/dz with redshift z as a function of z, Omega_M and Omega_L in a matter-dominated universe.

Formula from Carrol, Press & Turner,

H0=c=1.

◆ doptdepthdz()

double Cosmo::doptdepthdz ( double z )

This function calculates the change in optical depth dtau/dz with redshift z as a function of z, Omega_M and Omega_L in a matter-dominated universe.

Formula from Peebles, 1993. H0=c=sigma=n=1.

◆ dpropmotdisdz()

double Cosmo::dpropmotdisdz ( double z )

This function calculates the derivative of the proper motion distance d_M with respect to redshift z as a function of z, Omega_M and Omega_L in a matter-dominated universe.

Formula from Carrol, Press & Turner, 1992. This function also requires the function propmotdis(). H0=c=1.

◆ intcomvol()

double Cosmo::intcomvol ( double z )

This function calculates the all-sky comoving volume V as a function of z, Omega_M and Omega_L in a matter-dominated universe by integrating dcomvoldz().

It was written to test comvol().

◆ lookback()

double Cosmo::lookback ( double z )

This function calculates the lookback time t(0)-t(z) as a function of z, OmegaM and OmegaL by integrating the output of dlookbackdz.

◆ lumdis()

double Cosmo::lumdis ( double z )

This function calculates the luminosity distance d_L as a function of z, Omega_M and Omega_L in a matter-dominated universe, using the function propmotdis().

H0=c=1.

◆ optdepth()

double Cosmo::optdepth ( double z )

This function calculates the optical depth tau as a function of z, OmegaM and OmegaL by integrating the output of doptdepthdz.

Again, H0=c=sigma=n=1.

◆ propmotdis()

double Cosmo::propmotdis ( double z )

This function calculates the proper motion distance d_M as a function of z, Omega_M and Omega_L in a matter-dominated universe.

Formulae from Carrol, Press & Turner, 1992, Kolb & Turner, 1990, and my own derivation. Makes use of comdis(). H0=c=1.

◆ set_up()

void Cosmo::set_up	(	double	OmegaM_val,
		double	OmegaL_val
	)

This function sets the cosmological parameter values for the Cosmo functions.

Member Data Documentation

◆ OmegaL

double Cosmo::OmegaL

Dark energy density parameter value.

◆ OmegaM

double Cosmo::OmegaM

Matter density parameter value.

The documentation for this class was generated from the following files:

/Users/sfarrens/Documents/Codes/github/sfof/sfof/src/cosmo.hpp
/Users/sfarrens/Documents/Codes/github/sfof/sfof/src/cosmo.cpp

Public Member Functions

Public Attributes

Detailed Description

Member Function Documentation

◆ angdidis()

◆ angdidis2()

◆ comdis()

◆ comvol()

◆ dcomdisdz()

◆ dcomvoldz()

◆ dlookbackdz()

◆ doptdepthdz()

◆ dpropmotdisdz()

◆ intcomvol()

◆ lookback()

◆ lumdis()

◆ optdepth()

◆ propmotdis()

◆ set_up()

Member Data Documentation

◆ OmegaL

◆ OmegaM