Modelling Saturn ring temperature changes at equinox

Details Modelling Saturn ring temperature changes at equinox Modelling Saturn ring temperature changes at equinox

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf.1386s&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.1386

Computer Science

Scientific paper

The Cassini Composite infrared spectrometer (CIRS) retrieved the equinox temperatures of both sides of Saturn's main rings as the sun traversed from the south to north side of the rings. At equinox the rings are edge-on as seen from the sun and essentially edge-on (maximum ring opening of only about 2.5 degrees) as seen from Earth, so it is not possible to measure the main ring temperatures from Earth. At equinox the ring temperatures are essentially the same on the lit and unlit sides of the rings. To first order the temperatures are independent of phase angle demonstrating that the primary heat source is Saturn thermal and visible radiation. The ring temperatures at equinox were: C ring, 55-75 K; B ring, 45-60 K; Cassini Division, 45 - 58 K; and A ring, 43 - 52 K.

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