Physics
Scientific paper
Mar 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004pfte.confe...1a&link_type=abstract
Presented at the KITP Conference: Planet Formation: Terrestrial and Extra Solar, Mar 15, 2004, Kavli Institute for Theoretical P
Physics
Scientific paper
This talk describes a theoretical study of giant planet migration in the presence of both disk torques and scattering from other planets. These dynamical systems are highly chaotic and the results must be presented in terms of the distributions of possible orbital elements;we thus undertake a statistically comprehensive study of this migrationmechanism. During the planet formation epoch, both residual circumstellardisks and multiple planets are expected to be present. Disk torques andplanet-planet scattering change the orbital elements of migrating planetsin complementary ways. Disks are effective at moving planets inward(changing the semi-major axes a), whereas planet-planet scattering iseffective at increasing the orbital eccentricities e. The interplaybetween these two effects leads to a wide variety of possible outcomes.We show that this model - migration driven by tidal interactions with adisk and by dynamical scattering from other planets - naturally producesthe observed range of semi-major axis and eccentricity.
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