Cassini/VIMS observations of Saturn's infrared aurora

Details Cassini/VIMS observations of Saturn's infrared aurora Cassini/VIMS observations of Saturn's infrared aurora

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm34a..04s&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SM34A-04

Physics

2459 Planetary Ionospheres (5435, 5729, 6026), 5706 Aurorae, 5729 Ionospheres (2459), 6275 Saturn

Scientific paper

Here we report on the lastest images of Saturn's aurorae taken by the Visual and Infrared Mapping Spectrometer. These represent the first-ever images of the IR dayside and nightside aurorae at both the north and south poles of the planet, the first detailed temperature maps of Saturn's auroral region, as well as the highest spatial resolution images taken of any IR aurora beyond the Earth. The images show the aurorae to be highly complex and very dynamic. The main oval appears to be variable, as previous UV images have suggested. However, active polar emissions, as bright as the main auroral oval, are repeatedly observed to occur at very high latitudes (>85°). There are also significant levels of emission at all times inside the main auroral oval, though this is highly variable. In addition, there appears to be significant levels of auroral emission equatorward of the main oval, extending round from the midnight side.

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