Example of planetary growth, where the initial surface density of planetesimals is Σ₁ = 7 g cm⁻² and the initial core mass is M_core,1 = 14 M_⊕. M_Z is the mass of heavy elements, M_HHe the mass of H and He, and M_P the total mass of the planet. The solid lines indicate that the protoplanet is in the attached phase, whereas the dotted lines show the protoplanet in the detached phase. Bottom panel: simple zoom to appreciate better the growth of M_Z.