Core masses (solid lines) and envelope masses (dashed lines) as a function of time for the cases with planetesimal fragmentation considering p = 5/3 (black lines) and without planetesimal fragmentation (red lines), for a disk ten times more massive than the MMSN (top) and a disk eight times more massive than the MMSN (bottom). For this last case, the planets did not achieve the critical mass after 6 Myr of evolution. (Color version online.)