Uncovering of Small-Scale Quasi-Periodic Structure in Saturn's Ring C and Possible Origin

Details Uncovering of Small-Scale Quasi-Periodic Structure in Saturn's Ring C and Possible Origin Uncovering of Small-Scale Quasi-Periodic Structure in Saturn's Ring C and Possible Origin

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf..265m&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.265

Physics

Scientific paper

Quasi-periodic ring structure of mean wavelength 1.3 km is uncovered in Cassini radio occultation optical depth ( ) profiles of the innermost region of Ring C ( 74,480-77,740 km). The structure is characterized by two interfering "tones" separated in by few 100 meters. The mean increases slowly with ring radius. The observed behavior is consistent with presence of vertical ring corrugations few to 10 m in height. The corrugations are likely caused by a past event that slightly tilted the mean ring-plane and by subsequent differential nodal regression of particle orbits [1], [2]. The small mean implies an event 600 years old (late 1300's) and the two-tone separation suggests two sub-events 50 years apart.

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