Volume 375, Number 2, August IV 2001
|L31 - L34
|15 August 2001
Long-term collisional evolution of a dissipative particle disc perturbed by a giant-planet embryo
Université Paris 7 Denis Diderot, Service d'Astrophysique & CEA Saclay, France
Corresponding author: S. Charnoz, email@example.com
Accepted: 27 June 2001
Recent works have shown that in a disc of planetesimals perturbed by a proto-Jupiter, the coupling between embryo's perturbations and inelastic collisions heats up the disc over several astronomical units in a few 105 years. Using a simulation of a disc made of hard-spheres suffering inelastic collisions, we performed long-term numerical integrations to determine if the energy dissipated in collisions may finally damp eccentricities and inclinations induced by the proto-Jupiter. It is shown that the coupling between mean-motion resonances and collisions induces different damping regimes as a function of the protoplanet's mass. A 15 proto-Jupiter is more efficient than a 300 one to stir the disc over longer timescales, due to the non-emptying of isolated first order mean-motion resonances.
Key words: stars: planetary systems: formation / minor planets, asteroids
© ESO, 2001
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