Radius valley fit as a function of orbital period (blue line with errors in light-blue). The colour bar indicates total water mass fraction. Top panel: Planets around KGF-type stars. The green line and shade show the best fit found by Petigura et al. (2022) for these stellar types. Bottom panel: Planets around M dwarfs. The green line and shade show the best fit found by Luque & Pallé (2022). The particular clustering in the orbital period in both panels is due to the model limitations (Appendix A.6).