Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981icar...48..339s&link_type=abstract
Icarus, vol. 48, Nov. 1981, p. 339-342.
Astronomy and Astrophysics
Astronomy
8
Astronomical Models, Gaps, Gas Dynamics, Mimas, Planetary Orbits, Saturn Rings, Density Wave Model, Momentum Transfer, Orbit Perturbation, Particle Density (Concentration), Saturn, Rings, Satellites, Cassini Division, Gaps, Mimas, Dissipation, Gases, Gravity Effects, Particles, Collisions, Hypotheses, Simulations, Calculations, Numerical Methods, Resonance, Angular Momentum, Distribution, Parameters, Width
Scientific paper
The Cassini division in the rings of Saturn and the hypothesis that Mimas could excite a trailing spiral density wave in Saturn's rings near the 2:1 resonance are investigated using a numerical simulation of galactic gas dynamics. It is shown that the field of Mimas will clear a narrow gap in Saturn's rings just outside the 2:1 resonance with its orbital motion. The largest possible estimate of the width produced by this mechanism is about 280 km, and therefore this mechanism cannot be responsible for the entire Cassini division which is about 4800 km wide. However, the vacant rift about 170 km wide discovered by Voyager 1 just outside the resonance could be the result of such a mechanism.
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