Function

NumCosmoRecombHeII_ion_saha

Declaration [src] 

gdouble
nc_recomb_HeII_ion_saha (
  NcHICosmo* cosmo,
  const gdouble x
)

Description [src]

Calculates the equilibrium double/single ionized helium ratio ($X_{\HeIII}X_\e/X_{\HeII}$). See Eq. \eqref{eq:saha:HeII}.

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 $X_{\HeIII}X_\e/X_{\HeII}$.