The Ultraviolet Albedo Patterns of Mimas and Tethys

Details The Ultraviolet Albedo Patterns of Mimas and Tethys The Ultraviolet Albedo Patterns of Mimas and Tethys

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p14b..02h&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #P14B-02

Physics

[6280] Planetary Sciences: Solar System Objects / Saturnian Satellites

Scientific paper

Mimas and Tethys make a good comparative case for investigating weathering processes and effects. The Saturnian system is a complicated mix of neutrals, icy E-ring grains, moons, cold plasma and energetic particles. The interactions between these populations produce observable effects on the surfaces on the icy moons. The ultraviolet is a key place to look for these weathering fingerprints, as just the uppermost layers of the optical surface are probed; this is also the spectral region where the chemical products of photolysis are likely to be detected. We discuss spectral and spatial patterns on Mimas and Tethys using data from Cassini's Ultraviolet Imaging Spectrograph (UVIS) and the roles of the different exogenic processes in affecting the UV albedo trends across the surfaces. We discuss the possible presence and importance of NH3 and H2O2.

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