The mass of ejecta (M_d) for grain size ranges a_min − 10   μm (dash-dotted lines) and a_min − 100   μm (solid lines). The different colors correspond to different size distributions and material compositions: green (power-law distribution and amorphous carbon, with a_min as a free parameters), red (power-law distribution and amorphous carbon, with a_min = 0.62 μm), cyan (power-law distribution and two-layer grain), blue (Hanner distribution and amorphous carbon) and purple (Hanner distribution and two-layer grain). The contribution from ice grains is not considered.