Method
NumCosmoDistanceshift_parameter
Declaration [src]
gdouble
nc_distance_shift_parameter (
NcDistance* dist,
NcHICosmo* cosmo,
const gdouble z
)
Description [src]
The shift parameter $R(z)$ is defined as \begin{equation} R(z) = \frac{\sqrt{\Omega_{m0} H_0^2}}{c} (1 + z) D_A(z) = \sqrt{\Omega_{m0}} D_t(z), \end{equation} where $\Omega_{m0}$ is the matter density paremeter [nc_hicosmo_Omega_m0()], $D_A(z) = D_{H_0} D_t(z) / (1 + z)$ is the angular diameter distance and $D_t(z)$ is the transverse comoving distance [Eq. $\eqref{eq:def:Dt}$].
Parameters
cosmo-
Type:
NcHICosmoA
NcHICosmo.The data is owned by the caller of the method. z-
Type:
const gdoubleRedshift $z$.