Core mass (solid lines) and total mass of metals (dashed lines) as a function of envelope metallicity for different mean densities according to the measurement uncertainties in mass and radius. The numbers are the Love numbers k₂ for zero and maximum possible metallicity in the envelope. Shown are only models compatible with our model atmosphere (T_1   bar = 2080 K) for P_ad = 1 bar and P_ad = 50 bar.