Damping eccentricity of resonant exoplanets

Details Damping eccentricity of resonant exoplanets Damping eccentricity of resonant exoplanets

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sf2a.conf..398c&link_type=abstract

SF2A-2007: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics held in Grenoble, France, July

Astronomy and Astrophysics

Astrophysics

Scientific paper

In some exoplanetary systems, pairs of giant planets in Mean Motion Resonance (MMR) are observed. They have relatively small eccentricity, while numerical simulations usually show that their migration in the protoplanetary disk should make their eccentricity increase dramatically, particularly the innermost planet (ex: HD73526, GJ876). However, the inner disk was never properly taken into account, because its computation is expensive. With extended simulations, we show that the inner disk can play an effective role in damping the eccentricities of the migrating planets, and our results are in agreement with the observations.

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