Forming Big Moons Through Capture Around Gas Giant Planets

Details Forming Big Moons Through Capture Around Gas Giant Planets Forming Big Moons Through Capture Around Gas Giant Planets

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.5202w&link_type=abstract

American Astronomical Society, DPS meeting #42, #52.02; Bulletin of the American Astronomical Society, Vol. 42, p.1070

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Scientific paper

Agnor and Hamilton (2006 Nature 441:192-194) have convincingly demonstrated how Triton might have been captured in a three-body "binary-exchange” encounter involving Neptune and Pluto-mass binary. In such an event, a binary terrestrial object is tidally disrupted by a giant planet and one member of the binary is lost while the other member is captured. Here we consider how the process might play out for more massive binaries over a plausible range of encounter circumstances, and we show that such encounters sometimes produce moons exceeding a Mars mass around Jupiter-class planets. Binary-exchange capture might then be the best way to form moons large enough to hold onto temperate atmospheres and harbor water-dependent life.

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