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GEOPHYSICAL RESEARCH LETTERS,
VOL. 33,
L16203,
4 PP., 2006
doi:10.1029/2005GL025386
On a ring origin of the equatorial ridge of Iapetus
Institutes of Astronomy and Space Science, National Central University, Chung Li, Taiwan
Most recent Cassini observations by the Imaging Science Subsystem (ISS) showed that the third largest Saturnian satellite, Iapetus, has a curious ridge system exactly aligned with its equator [Porco et al., 2005]. Because Iapetus has a large Hill sphere for the trapping of circum-satellitary material, a ring system might have been present during its formation. A scenario is proposed to describe how the equatorial ridge system could have been produced by the collisional accretion of a ring remnant subsequent to the formation of the proto-Iapetus.
Received 2 December 2005; accepted 20 July 2006; published 29 August 2006.
Citation: (2006), On a ring origin of the equatorial ridge of Iapetus, Geophys. Res. Lett., 33, L16203, doi:10.1029/2005GL025386.
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