Evolution of the temperature (left column) and density (right column) assuming accretion of Ceres in the Kuiper belt for a dust/ice ratio of 3 : 1 (top and middle rows) and 1 : 1 (bottom row). The accretion time is t_ac = 10 Myr (top row) and t_ac = 100 Myr (middle and bottom rows). Thicker crust and smaller cores are obtained compared to models shown in Fig. 5. A warmer present-day interior is obtained for models with a longer accretion, which is an effect of weaker compaction and slower cooling.