Left panel: synthetic M − R relationship as in Fig. 10, but including only synthetic planets with a final semimajor axis smaller than 1 AU. The color coding and the observational comparison sample is the same as in Fig. 10. Right panel: distribution of radii of planets with masses between 100 and 300 M_⊕. The red solid line is for planets with a semimajor axis less than 1 AU, while the black dashed-dotted line shows planets outside of this distance. Planets reaching the inner border of the computational disk have been excluded. The age of the population is 5 Gyr.