Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002dda....33.1101c&link_type=abstract
American Astronomical Society, DDA Meeting #33, #11.01; Bulletin of the American Astronomical Society, Vol. 34, p.940
Astronomy and Astrophysics
Astronomy
Scientific paper
Planetary rings showcase a rich interplay of forces due to interparticle collisions, self-gravity, and the gravity of shepherd moons. They present miniature versions of phenomena thought to occur in protoplanetary disks: viscous dissipation, the clearing of annular gaps by large bodies, and migration and eccentricity evolution. I will focus on one longstanding problem in ring dynamics, that of apsidal alignment: how an eccentric ring precesses about the central planet as if it were a rigid body. I will demonstrate how forces due to collisions, self-gravity, and the quadrupole field of the central planet can be balanced to produce ring surface densities that agree with observations.
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