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

Author

Listed:
  • B. Sicardy

    (Observatoire de Paris, Institut Universitaire de France, DESPA)

  • F. Roddier

    (Institute for Astronomy, University of Hawaii)

  • C. Roddier

    (Institute for Astronomy, University of Hawaii)

  • E. Perozzi

    (Observatoire de Paris, Institut Universitaire de France, DESPA
    Telespazio)

  • J. E. Graves

    (Institute for Astronomy, University of Hawaii)

  • O. Guyon

    (Institute for Astronomy, University of Hawaii
    Ecole Normale Supérieure)

  • M. J. Northcott

    (Institute for Astronomy, University of Hawaii)

Abstract

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 discovered1 by stellar occultations in 1984, they appear to have persisted2,3,4,5,6, perhaps through a gravitational resonance effect involving the satellite Galatea6,7,8. 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 paper9), indicate that the ring arcs are near, but not within the resonance with Galatea, in contrast to what is predicted by some models.

Suggested Citation

  • B. Sicardy & F. Roddier & C. Roddier & E. Perozzi & J. E. Graves & O. Guyon & M. J. Northcott, 1999. "Images of Neptune's ring arcs obtained by a ground-based telescope," Nature, Nature, vol. 400(6746), pages 731-733, August.
    • Handle: RePEc:nat:nature:v:400:y:1999:i:6746:d:10.1038_23410
    DOI: 10.1038/23410
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