W-shaped occultation signatures - Inference of entwined particle orbits in charged planetary ringlets

Details W-shaped occultation signatures - Inference of entwined particle orbits in charged planetary ringlets W-shaped occultation signatures - Inference of entwined particle orbits in charged planetary ringlets

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983icar...54..212e&link_type=abstract

(Saturn Conference, Tucson, AZ, May 11-15, 1982) Icarus (ISSN 0019-1035), vol. 54, May 1983, p. 212-226. NASA-supported research

Astronomy and Astrophysics

Astronomy

10

Astronomical Models, Charged Particles, Elliptical Orbits, Radio Occultation, Saturn Rings, Uranus Rings, Orbit Perturbation, Particle Density (Concentration), Particle Interactions, Toruses, Planets, Saturn, Uranus, Ringlets, Particles, Orbits, Charged Particles, Shape, Occultations

Scientific paper

A model for the ringlets of Saturn is proposed where concentration of material near the inner and outer radial edges of the ringlets is a natural consequence of particles in entwined elliptical orbits, with the same particles alternately defining both edges. The existence of a collisionless state where particles fly along entwined paths in a compressed helical formation on and within a toroidal surface whose meridional cross section is a very thin ellipse is explained. The cancellation of strong oblateness perturbations by an extremely weak force normal to the orbit planes and directed primarily outward from the major axis of the meridional cross section of the torus is shown, and the possibility that electric repulsion of like-charged particles could provide the expansion force preventing cross-sectional collapse is examined. The model features a large stability domain within which orbital inclinations and arguments of periapse oscillate but do not progress. Features of the model that can be tested experimentally are mentioned.

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