Satellite Capture via Binary-Planet Gravitational Encounters

Details Satellite Capture via Binary-Planet Gravitational Encounters Satellite Capture via Binary-Planet Gravitational Encounters

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dda....37.1303a&link_type=abstract

American Astronomical Society, DDA meeting #37, #13.03; Bulletin of the American Astronomical Society, Vol. 38, p.674

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Given the observed prevalence ( 1-10%) of gravitationally bound pairs in the asteroid and Kuiper belts and the variety of processes inherent to solar system evolution that create these pairs among the minor planets, three-body gravitational encounters between binaries and accumulating planets were a common occurrence in the early solar system. We have recently shown that Neptune's large satellite Triton may have been captured in just such an encounter (Agnor and Hamilton 2006). Here we will report on our efforts to extend this capture mechanism to other potentially captured planetary satellites. In particular we will discuss the binary characteristics and encounter dynamics needed for transfer between heliocentric and planetocentric orbits. We will also discuss this model of capture in context with planetary formation and satellite evolution.

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