Function

NumCosmoRecombHeI_ion_saha

Declaration [src] 

gdouble
nc_recomb_HeI_ion_saha (
  NcHICosmo* cosmo,
  const gdouble x
)

Description [src]

Calculates the equilibrium single/non-ionized helium ratio $X_{\HeII}X_\e/X_{\HeI}$. See Eq. \eqref{eq:saha:HeI}.

Parameters

cosmo

Type: NcHICosmo

A NcHICosmo.

The data is owned by the caller of the function.
x

Type: const gdouble

Redshift factor, $x = 1+z$.

Return value

Type: gdouble

The ratio $X_{\HeII}X_\e/X_{\HeI}$.