EAS Publications Series
Volume 41, 2010Physics and Astrophysics of Planetary Systems
|Page(s)||387 - 390|
|Published online||08 January 2010|
T. Montmerle, D. Ehrenreich and A.-M. Lagrange (eds)
EAS Publications Series, 41 (2010) 387-390
Planetary migration in resonance : the question of the eccentricities
Institut für Astronomie & Astrophysik, Universität Túbingen, Auf der Morgenstelle 10, 72076 Tübingen, Germany
2 Max-Planck-Institut für Astronomie, Königstuhl 17, 69711 Heidelberg, Germany
The formation of resonant planets pairs in exoplanetary systems involves planetary migration inside the protoplanetary disc: an inwards migrating outer planet captures in Mean Motion Resonance an inner planet. During the migration of the resonant pair of planets, the eccentricities are expected to rise excessively, if no damping mechanism is applied on the inner planet. We express the required damping action to match the observations, and we show that the inner disk can play this role. This result applies for instance to the system GJ 876: we reproduce the observed orbital elements through a fully hydrodynamical simulation of the evolution of the resonant planets.
© EAS, EDP Sciences, 2010
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