AAS Meeting #194 - Chicago, Illinois, May/June 1999
Session 15. The Solar System
Display, Monday, May 31, 1999, 9:20am-6:30pm, Southeast Exhibit Hall

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[15.10] Interplanetary Medium and Planetary Migration

N. Haghighipour (University of Missouri-Columbia)

The results of a series of numerical integrations of a planetary system consisting of a star and two planets are presented. The system is assumed to be moving in a uniform interplanetary medium that is rotating around the central star. Numerical integrations indicate that the inner planet migrates inward while the outer planet migrates outward until it temporarily locks into a resonance state. The duration of this resonance lock is dependent on the density of the medium.

In this study, the method of partial averaging near a resonance has been employed in order to account for the dynamical evolution of the system during the migraiton as well as the resonance state and also in order to analytically explain the dependence of the duration of the resonance lock on the density of the interplanetary medium.

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