Computer Science
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf...94h&link_type=abstract
EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.94
Computer Science
Scientific paper
Spectral maps of Mimas' daytime thermal emission show a previously unobserved thermal anomaly on Mimas' surface. A sharp V-shaped boundary, centered at 0° N and 180° W, separates relatively warm daytime temperatures from a cooler anomalous region occupying low- to mid-latitudes on the leading hemisphere. Subsequent observations show the anomalous region is also warmer than its surroundings at night, indicating high thermal inertia. Thermal inertia in the anomalous region is 67±30 Jm-2K-1s½, compared to <16 Jm-2K-1s½ outside the anomaly. Bolometric Bond albedos are similar between the two regions, 0.49 - 0.70. The mapped portion of the thermally anomalous region coincides in shape and location to a region of high-energy electron deposition from Saturn's magnetosphere, which also has unusually high near-UV reflectance. It is therefore likely that high-energy electrons, which penetrate Mimas' surface to the centimeter depths probed by diurnal temperature variations, also alter the surface texture dramatically increasing its thermal inertia.
Howett J. A. C.
Hurford Terry
Johnson Robert E.
Parancias C.
Schenk Paul
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