On diskplanet interactions and orbital eccentricities
Abstract
The eccentricity evolution from density wave interaction between a planetesimal and a Keplerian disk is studied. While it is known that Lindblad resonances both interior and exterior to the perturber's orbit excite its eccentricity, we show that corotation resonances in these regions become ineffective at eccentricity damping if the object is embedded in a continuous disk without a gap. However, under these conditions another class of Lindblad resonances exists that has not been included in earlier treatments of this problem. These operate on disk material coorbiting with the perturber and become the most important source of eccentricity damping. We employ a model problem to obtain estimates of the various disk torques and conclude, therefrom, that the eccentricity ultimately suffers decay. The limitations of this model are also discussed, as is the need for further studies.
 Publication:

Icarus
 Pub Date:
 February 1988
 DOI:
 10.1016/00191035(88)901030
 Bibcode:
 1988Icar...73..330W
 Keywords:

 Accretion Disks;
 Eccentric Orbits;
 Kepler Laws;
 Orbital Resonances (Celestial Mechanics);
 Planetary Orbits;
 Protoplanets;
 Corotation;
 Density Wave Model;
 Orbit Decay;
 Perturbation Theory;
 Planetary Evolution;
 Solar System;
 PLANETS;
 DISK;
 INTERACTIONS;
 ORBITS;
 ECCENTRICITY;
 EVOLUTION;
 DENSITY;
 PLANETESIMALS;
 COROTATION;
 RESONANCE;
 PERTURBATIONS;
 DAMPING;
 MODELS;
 TORQUE;
 DECAY;
 CELESTIAL MECHANICS;
 PARAMETERS;
 CALCULATIONS;
 Astronomy; Planets