Core growth by pebble accretion. Left panel: mass fractions of solids impacting the core directly (green curves) or reaching the core by rainout of ablated material (blue curve). The differently spaced green curves correspond to three sizes of pebbles: 0.1 m (solid), 1 m (dashed), 0.01 m (dash-dotted). Right panel: growth of the core over time. In this figure, the rainout scenario is indicated by the blue curve and the mixing case is shown by the green curve. Both curves in panel b correspond to 0.1 m impactors.