Temperature, radius, porosity, and density assuming a fast accretion within 2 Ma for model CIa (left column) and CIb (right column). Upper row: evolution of the radius (main plots) and early evolution of the radius and of the central temperature (subplots). Middle row: evolution of the central temperature and of the radius. Bottom row: evolution of the central porosity/density (dashed lines) and average porosity/density (solid lines). The grey area indicates the average density of Ceres according to our present knowledge.