MR diagram for different stellar masses. The colour bar represents the total water mass fraction in the planets. Dots correspond to the nominal output, diamonds to collisions. The brown- and blue-dashed lines correspond to a theoretical composition of Earth-like and 50% water + 50% Earth-like, as defined in Appendix B.5, with dark-blue indicating condensed-water worlds and light-blue indicating steam worlds. The green-dotted curves correspond to 50% steam + 50% Earth-like from Aguichine et al. (2021) (T_eq = 400 K for dark-green and T_eq = 600 K for light-green). Grey dots are real exoplanets with mass and radius measurements better than 75 and 20%, respectively (data taken from the NASA Exoplanet Archive on 08.09.23). The real exoplanets in each panel correspond to the stellar masses of 0–0.25 M_⊙ for M_⋆ = 0.1 M_⊙, 0.25–0.55 M_⊙ for M_⋆ = 0.4 M_⊙, 0.55–0.85 M_⊙ for M_⋆ = 0.7 M_⊙, 0.85–1.15 M_⊙ for M_⋆ = 1.0 M_⊙, 1.15–1.4 M_⊙ for M_⋆ = 1.3 M_⊙, and 1.4–1.7 M_⊙ for M_⋆ = 1.5 M_⊙.