Physics
Scientific paper
Feb 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983icar...53..207g&link_type=abstract
(Saturn Conference, Tucson, AZ, May 11-15, 1982.) Icarus, vol. 53, Feb. 1983, p. 207-218. NASA-supported research.
Physics
26
Energy Dissipation, Gravitational Effects, Saturn Rings, Saturn Satellites, Eccentricity, Heuristic Methods, Oscillations, Particle Motion, Torque, Saturn, Rings, Satellites, Oscillations, Motion, Particles, Geometry, Dynamics, Torque, Damping, Resonance, Interactions
Scientific paper
A discussion is presented on the gravitational interaction between ring systems and nearby satellites. A shepherd satellite lacking damping mechanisms will force oscillations in the motion of a ring particle that are symmetrical with respect to the encounter geometry. If such damping mechanisms as density wave propagation or a dissipative medium are present, a lag in particle response provides the asymmetry that exerts a net torque on the rings. While the torque on a given particle depends on the degree of damping, that dependence disappears when the torque is averaged over a range of orbits spanning resonances if the degree of damping is within a certain range. A torque that is much lower than the standard formula results from excessively weak or strong damping.
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