distCelestine Class Reference

#include <distcelestine.h>

Inheritance diagram for distCelestine:

List of all members.

Public Member Functions
	distCelestine ()
	Default constructor.
double	E (double) const
	H/H0 at given redshift.
double	initialRho_q (double a)
	Density at given scale factor of quintessence field.
double	omega_0 ()
	Return total omega today.
double	omega_q ()
	Omega Quintessence.
double	rho_q ()
	Density in quintessence field today in Mpc^-4.
void	setOmega_q (double x)
	Set Omega quintessence.
void	setW0 (double x)
	Set w_0.
void	setWa (double x)
	Set w_a.
double	w0 () const
	Return w_0.
double	wa () const
	Return w_a.
Protected Member Functions
bool	calc_isrebounding ()
	Partial implementation of calculation of whether or not Universe is rebounding.
double	quintEfac (double) const
	Factor in front of Omega_q in E(z).
Protected Attributes
double	Omega_q
	Omega_quintessence.
double	w_0
	w_0 in w(a) expression
double	w_a
	w_a in w(a) expression

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Detailed Description

distCosmos derived object to represent anything with dark energy equation of state parameter

w(a) = w_0 + w_1*(1-a)

which means that

E(z) = sqrt( (1+z)^3 omega_m + (1+z)^2 omega_k + f(z) omega_q )

with

f(z) = exp( - 3 w_1 z / (1+z) ) * ( 1 + z )^(3*(1+w_0+w_1))

Note that this class actually supports a combination of the quintessence field and a cosmological constant, if one is so inclined.

Definition at line 26 of file distcelestine.h.

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Constructor & Destructor Documentation

distCelestine::distCelestine (   )

Default constructor. Definition at line 8 of file distcelestine.cc. References distCosmos::omega_m(), distCosmos::omega_relativistic(), distCosmos::omega_v(), setOmega_q(), distCosmos::setOmega_v(), setW0(), and setWa().

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Member Function Documentation

bool distCelestine::calc_isrebounding (   )  [protected, virtual]

Partial implementation of calculation of whether or not Universe is rebounding. This function is supposed to determine if the universe is rebounding from a previous bout of contraction. Unfortunately, we don't know how to do this in this particular case, so we just assume it isn't -- unless we have set Omega_quintessence to zero, in which case we know what to do. Reimplemented from distCosmos. Definition at line 26 of file distcelestine.cc. References distCosmos::calc_isrebounding(), distCosmos::omega_m(), omega_q(), Omega_q, distCosmos::omega_v(), w_0, and w_a.

double distCelestine::E (  double  z  )  const [virtual]

H/H0 at given redshift. Parameters: z  Redshift Reimplemented from distCosmos. Definition at line 65 of file distcelestine.cc. References distCosmos::Omega_k, distCosmos::Omega_m, Omega_q, distCosmos::Omega_rel, distCosmos::Omega_v, and quintEfac().

double distCelestine::initialRho_q (  double  a  )  [inline]

Density at given scale factor of quintessence field. Definition at line 54 of file distcelestine.h. References distCosmos::a_0(), quintEfac(), and rho_q().

double distCelestine::omega_0 (   )  [inline, virtual]

Return total omega today. Reimplemented from distCosmos. Definition at line 46 of file distcelestine.h. References distCosmos::omega_m(), omega_q(), distCosmos::omega_relativistic(), and distCosmos::omega_v(). Referenced by setOmega_q().

double distCelestine::omega_q (   )  [inline]

Omega Quintessence. Definition at line 44 of file distcelestine.h. References Omega_q. Referenced by calc_isrebounding(), main(), omega_0(), and rho_q().

double distCelestine::quintEfac (  double  z  )  const [protected]

Factor in front of Omega_q in E(z). This is equal to exp[ 3 * int_0^z (1 + w(z))/(1+z) ] specialized to the current case. Parameters: z  Redshift Definition at line 52 of file distcelestine.cc. References w_0, and w_a. Referenced by E(), and initialRho_q().

double distCelestine::rho_q (   )  [inline]

Density in quintessence field today in Mpc^-4. Definition at line 52 of file distcelestine.h. References omega_q(), and distCosmos::rho_0(). Referenced by initialRho_q().

void distCelestine::setOmega_q (  double  x  )  [inline]

Set Omega quintessence. Definition at line 58 of file distcelestine.h. References omega_0(), distCosmos::Omega_k, and Omega_q. Referenced by distCelestine(), and main().

void distCelestine::setW0 (  double  x  )  [inline]

Set w_0. Definition at line 59 of file distcelestine.h. References w_0. Referenced by distCelestine(), and main().

void distCelestine::setWa (  double  x  )  [inline]

Set w_a. Definition at line 60 of file distcelestine.h. References w_a. Referenced by distCelestine(), and main().

double distCelestine::w0 (   )  const [inline]

Return w_0. Definition at line 49 of file distcelestine.h. References w_0. Referenced by main().

double distCelestine::wa (   )  const [inline]

Return w_a. Definition at line 50 of file distcelestine.h. References w_a. Referenced by main().

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Member Data Documentation

double distCelestine::Omega_q [protected]

Omega_quintessence. Definition at line 32 of file distcelestine.h. Referenced by calc_isrebounding(), E(), omega_q(), and setOmega_q().

double distCelestine::w_0 [protected]

w_0 in w(a) expression Definition at line 29 of file distcelestine.h. Referenced by calc_isrebounding(), quintEfac(), setW0(), and w0().

double distCelestine::w_a [protected]

w_a in w(a) expression Definition at line 30 of file distcelestine.h. Referenced by calc_isrebounding(), quintEfac(), setWa(), and wa().

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

• distcelestine.h
• distcelestine.cc

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