Figure 2:

Differential particle mass flux (g m⁻² s⁻¹) as a function of mass and velocity encountering the top of the atmosphere (exobase) for Jupiter (Left) and Saturn (Right), for dust populations from the Edgeworth-Kuiper belt (EKB, Top), Oort-Cloud comets (OCC, Middle), and Jupiter-family comets (JFC, Bottom). Particle fluxes of zero were assigned to 10⁻³⁰ g m⁻² s⁻¹ (dark blue) for plotting purposes on this logarithmic scale. Gravitational focusing is considered in these calculations, such that the lower limit to the particle entry velocity is the escape velocity of the planet at the exobase. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)