Spherical Accretion

Abstract

We compare different examples of spherical accretion onto a gravitating mass. Limiting cases include the accretion of a collisionally dominated fluid and the accretion of collisionless particles. We derive expressions for the accretion rate and density profile for semi-collisional accretion which bridges the gap between these limiting cases. Particle crossing of the Hill sphere during the formation of the outer planets is likely to have taken place in the semi-collisional regime.

ApJ Letters, 3 pages

References in corpus (2)

• Planet Formation by Coagulation: A Focus on Uranus and Neptune
• Formation of Kuiper Belt Binaries

Cited by in corpus (7)

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• Formation of Jupiter and Conditions for Accretion of the Galilean Satellites
• Impetus: Consistent SPH calculations of 3D spherical Bondi accretion onto a black hole
• Energy Flux and Particle Flux in Steady-State Solutions of Nuclear Star Clusters