34th Meeting of the AAS Division on Dynamical Astronomy, May 2003
12 Migration and Others
Oral, Wednesday, May 7, 2003, 10:50am-12:35pm,

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[12.03] Resonant Inclination Excitation of Migrating Giant Planets

E. W. Thommes (University of California, Berkeley), J. J. Lissauer (NASA Ames Research Center)

The observed orbits of extrasolar planets suggest that many giant planets migrate a considerable distance towards their parent star as a result of interactions with the protoplanetary disk, and that some of these planets become trapped in eccentricity-exciting mean motion resonances with one another during this migration. Using three-dimensional numerical simulations, we show that resonant migration can also systematically excite large orbital inclinations in pairs of giant planets. Such a mechanism may not be uncommon in the early evolution of a planetary system, and a significant fraction of exoplanetary systems may turn out to be non-coplanar. In fact, non-coplanar embedded planets have already been invoked as an explanation for the warped disk of Beta Pictoris.

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Bulletin of the American Astronomical Society, 35 #4
© 2003. The American Astronomical Soceity.