Images of Neptune's ring arcs obtained by a ground-based telescope

Details Images of Neptune's ring arcs obtained by a ground-based telescope Images of Neptune's ring arcs obtained by a ground-based telescope

Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999natur.400..731s&link_type=abstract

Nature, Volume 400, Issue 6746, pp. 731-733 (1999).

Physics

Optics

25

Scientific paper

Neptune has a collection of incomplete narrow rings, known as ring arcs, which should in isolation be destroyed by differential motion in a matter of months. Yet since first discovered by stellar occultations in 1984, they appear to have persisted, perhaps through a gravitational resonance effect involving the satellite Galatea. Here we report ground-based observations of the ring arcs, obtained using an adaptive optics system. Our data, and those obtained using the Hubble Space Telescope (reported in a companion paper), indicate that the ring arcs are near, but not within the resonance with Galatea, in contrast to what is predicted by some models.

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