Same as Fig. 4 but it shows the impact of the atmospheric opacity (O1, top panels) and of the composition of the solid core (I1, bottom panels). These simulations cover a smaller range in initial core masses than the other ones. In simulation O1 the atmospheric opacity is uniformly increased by a factor 10. In simulation I1 an ice mass fraction in the core of unity instead of an Earth-like composition was assumed. The thin gray line shows the transition mass and radius in the nominal simulation M0 to allow direct comparison.