Method

NumCosmoDistanceconformal_lookback_time

Declaration [src]

gdouble
nc_distance_conformal_lookback_time (
  NcDistance* dist,
  NcHICosmo* cosmo,
  const gdouble z
)

Description [src]

This function computes the conformal look-back time $\eta_{lb}(z)$. Within the chosen units it becomes the same as the comoving distance [nc_distance_comoving()], given in Eq. $\eqref{eq:def:dc}$.

Parameters

cosmo

Type: NcHICosmo

A NcHICosmo.

The data is owned by the caller of the method.

z

Type: const gdouble

Redshift $z$.

Return value

Type: gdouble

$\eta_{lb}(z)$.