Computer Science
Scientific paper
Mar 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.320..141g&link_type=abstract
Nature (ISSN 0028-0836), vol. 320, March 13, 1986, p. 141-143.
Computer Science
29
Cosmic Dust, Electromagnetic Radiation, Planetary Rotation, Saturn Rings, Angular Momentum, Optical Thickness, Particle Collisions, Particle Motion, Saturn, Electromagnetism, Angular Momentum, Rings, Transport, Spokes, Features, Photometry, Dynamics, Dust, Particles, Magnetic Effects, B Ring, Time Scale, Coupling, Optical Properties, Depth, Orbits
Scientific paper
The observed 'spokes' in Saturn's rings have been interpreted as consisting of elevated, sub-micrometre sized dust particles. The authors show that submicrometre dust particles sporadically elevated above the ring are subject to electromagnetic forces which will reduce their angular momentum inside synchronous orbit and increase it outside. When the dust is reabsorbed by the ring the angular momentum of the ring is decreased (increased) inside (outside) of synchronous orbit. For the case of the spokes in Saturn's B-ring it is estimated that the timescale for transporting ring material due to this angular momentum coupling effect is comparable to the viscous transport time or even smaller.
Goertz Christoph K.
Grün Eberhard
Havnes Ove
Huen Ip Wing
Morfill Gregor E.
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