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The source of Saturn's G ring

Authors
  • Matthew M, Hedman
  • Joseph A, Burns
  • Matthew Tiscareno
  • Carolyn C, Porco
  • Geraint H, Jones
  • Elias, Roussos
  • Norbert, Krupp
  • Chris, Paranicas
  • Sascha, Kempf
Type
Published Article
Journal
Science
Publisher
American Association for the Advancement of Science (AAAS)
Publication Date
Aug 26, 2007
Volume
317
Issue
5838
Pages
653–656
Source
SETI Institute
License
White

Abstract

The origin of Saturn s narrow G ring has been unclear. We show that it contains a bright arc located 167,495.6±1.3 km from Saturn s center. This longitudinally localized material is trapped in a 7: 6 corotation eccentricity resonance with the satellite Mimas. The cameras aboard the Cassini spacecraft mainly observe small (1 to 10 micrometers) dust grains in this region, but a sharp decrease in the flux of energetic electrons measured near this arc requires that it also contain larger (centimeter-to meter-sized) bodies whose total ...

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