Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991sci...253..995p&link_type=abstract
Science (ISSN 0036-8075), vol. 253, Aug. 30, 1991, p. 995-1001.
Astronomy and Astrophysics
Astronomy
51
Neptune Satellites, Planetary Rings, Planetary Structure, Satellite Orbits, Voyager Project, Astronomical Models, Stellar Occultation, Ultraviolet Spectrometers
Scientific paper
The Voyager mission revealed a complex system of rings and ring arcs around Neptune and uncovered six new satellites, four of which occupy orbits well inside the ring region. Analysis of Voyager data shows that a radial distortion with an amplitude of approximately 30 kilometers is traveling through the ring arcs, a perturbation attributable to the nearby satellite Galatea. Moreover, the arcs appear to be azimuthally confined by a resonant interaction with the same satellite, yielding a maximum spread in ring particle semimajor axes of 0.6 kilometer and a spread in forced eccentricities large enough to explain the arc's 15-kilometer radial widths. Additional ring arcs discovered in the course of this study give further support to this model.
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