Method

NumCosmoHICosmoHe_number_density

Declaration [src]

gdouble
nc_hicosmo_He_number_density (
  NcHICosmo* cosmo
)

Description [src]

Calculates the Helium-4 number density $n_\mathrm{4He} = Y_p n_{b0} / m_\mathrm{4He}$ using nc_hicosmo_Yp_4He() $\times$ nc_hicosmo_baryon_density() / ncm_c_rest_energy_4He().

Return value

Type: gdouble

The baryon density $n_\mathrm{4He}$.