Temporary Capture of Planetesimals by a Planet

Details Temporary Capture of Planetesimals by a Planet Temporary Capture of Planetesimals by a Planet

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufm.p51a1191i&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #P51A-1191

Physics

6200 Planetary Sciences: Solar System Objects

Scientific paper

Planetesimals that undergo a close encounter with a planet cannot become captured permanently unless energy dissipation is taken into account, but some of them can be temporarily captured in the vicinity of the planet for an extended period of time. We examine this temporary capture of planetesimals from heliocentric circular orbits using three-body orbital integration. In the case of planetesimals initially on circular orbits studied in the present work, they undergo a close encounter with the planet before experiencing temporary capture. When the planetesimals are scattered by the planet into the vicinity of a pseudo-periodic orbit around the planet, the duration of temporary capture becomes long. We evaluate the rate of temporary capture and find that the ratio of the temporary capture rate of planetesimals to their collision rate onto the planet increases with increasing semi-major axis of the planet.

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