Evolution of the radius (upper blue curve) and the internal structure of the model “new (1/3)” of Fig. 7, i.e. of the model computed with the accretion rate of Eq. (19) with f = 1/3 using the new version of the code (Sect. 2), starting from the initial model given by Eq. (20). The dark blue areas are convective zones, the light blue areas are radiative regions, and the grey area is the envelope (see footnote 4).