Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21822407f&link_type=abstract
American Astronomical Society, AAS Meeting #218, #224.07; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
We have begun a program of assessing outer Solar system formation theories. In that endeavor, we have investigated the formation scenarios of Thommes ejection (Thommes et al. 2001) and the Nice Model (Tsiganis et al. 2006). Our results indicate that Thommes ejection is able to reproduce the satellite systems of Saturn in 88% of simulations, while the regular moons of Jupiter are formed in 50% of the simulations. Given the known resonances exerted by the giant planets and the evidence that the outer planets likely experienced significant re-configuration, it is necessary to evaluate the possibility of satellite formation during planetary migration.
Thommes ejection theory, where Uranus and Neptune form near Jupiter and are perturbed into their current locations, has been successfully and extensively tested. As both Uranus and Neptune possess a system of moons, an in-depth analysis of the survivability of forming moons around an ejected proto-planet is needed to further assess the validity of the Thommes model.
Using an N-body planetary code, we simulated the ejection of proto-planets by Jupiter. Satellite formation was also simulated during the planetary migration. We find that the proto-Uranus and Neptune bodies are able to retain their systems of moons during migration and during a set of control simulations. The systems of moons around either proto-planet do not resemble the current satellites. The findings of these simulations will be discussed. Additional simulations, investigating the viability of the Nice Model will be the focus of future work.
Fuse Christopher R.
Neville M.
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