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Title:
Lorentz resonances and the structure of the Jovian ring
Authors:
BURNS, J. A.; SCHAFFER, L. E.; SHOWALTER, M. R.; GREENBERG, R. J.
Affiliation:
AC(Cornell University, Ithaca, NY) AD(Science Applications, Inc., Planetary Science Institute, Tucson, AZ)
Journal:
Nature (ISSN 0028-0836), vol. 316, July 11, 1985, p. 115-119.
Publication Date:
07/1985
Category:
Lunar and Planetary Exploration
Origin:
STI
NASA/STI Keywords
COSMIC DUST, JUPITER RINGS, LORENTZ FORCE, ORBIT PERTURBATION, PLANETARY MAGNETIC FIELDS, SATURN RINGS, CHARGED PARTICLES, MAGNETIC RESONANCE, PLANETARY RINGS, SOLAR SYSTEM
Bibliographic Code:
1985Natur.316..115B

Abstract

Charged dust orbiting through spatially periodic planetary magnetic fields will experience time-variable electromagnetic forces. When the forcing frequencies are nearly commensurate with the particle's orbital frequency, the particle undergoes large out-of-plane and radial excursions. Specific 'Lorentz' resonances, corresponding to particular spatial periodicities in the magnetic field, occur on either side of synchronous orbit. Lorentz resonance locations and strengths for the Jovian and Saturnian rings are described. The boundaries of the halo of the Jovian ring, and perhaps other ring structures, are near resonances.

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