Absorption fraction (blue) and envelope-to-core ratio (ecr; green) of a planet impacted by 0.1 m pebbles.The green curves indicate the ecr, defined as M_env∕M_core. The dash-dotted curve is its silicate mass fraction and the dashed curve is its hydrogen and helium mass fraction. They sum to the total ecr, shown by the solid green line. The blue absorption curve indicates the mass fraction of the accreting solids that can be contained by the envelope as vapor.