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Title:
The ethereal rings of Jupiter and Saturn
Authors:
BURNS, J. A.; SHOWALTER, M. R.; MORFILL, G. E.
Affiliation:
AB(Cornell University, Ithaca, NY) AC(Max-Planck-Institut fuer extraterrestrische Physik, Garching, West Germany)
Journal:
IN: Planetary rings (A85-34401 15-88). Tucson, AZ, University of Arizona Press, 1984, p. 200-272.
Publication Date:
00/1984
Category:
Lunar and Planetary Exploration
Origin:
STI
NASA/STI Keywords
JUPITER RINGS, PLANETARY STRUCTURE, SATURN RINGS, CHARGED PARTICLES, JUPITER SATELLITES, MICROMETEOROIDS, OPACITY, ORBITAL MECHANICS, PARTICLE SIZE DISTRIBUTION, PLANETARY MAGNETOSPHERES, SATURN SATELLITES, VOYAGER PROJECT
Bibliographic Code:
1984pr...book..200B

Abstract

The brighter main band of the Jovian ring, which is tenuous and exhibits little substructure, lies in the equatorial plane at 1.7-1.8 Jupiter radii, R(J); this is well within the Roche limit. Since dynamical evolution times and survival lifetimes for micron grains are of the order of less than 100-1000 years, the visible Jovian ring must be continuously replenished. It is suggested that most small grains are generated by micrometeoroids colliding into unseen parent bodies residing in the main band. The halo is composed of still smaller particles and is radially localized at about 1.3-1.7 R(J). Unlike the rings of Saturn and Uranus, the Jovian rings are distinguished by the determination of their form by single-particle dynamics rather than collective effects. 
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