The Equatorial Ridges of Pan and Atlas: Terminal Accretionary Ornaments?

Details The Equatorial Ridges of Pan and Atlas: Terminal Accretionary Ornaments? The Equatorial Ridges of Pan and Atlas: Terminal Accretionary Ornaments?

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sci...318.1622c&link_type=abstract

Science, Volume 318, Issue 5856, pp. 1622- (2007).

Computer Science

17

Scientific paper

In the outer regions of Saturn’s main rings, strong tidal forces balance gravitational accretion processes. Thus, unusual phenomena may be expected there. The Cassini spacecraft has recently revealed the strange “flying saucer” shape of two small satellites, Pan and Atlas, located in this region, showing prominent equatorial ridges. The accretion of ring particles onto the equatorial surfaces of already-formed bodies embedded in the rings may explain the formation of the ridges. This ridge formation process is in good agreement with detailed Cassini images showing differences between rough polar and smooth equatorial terrains. We propose that Pan and Atlas ridges are kilometers-thick “ring-particle piles” formed after the satellites themselves and after the flattening of the rings but before the complete depletion of ring material from their surroundings.

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