Cassini/VIMS observations of the infrared aurora Tom Stallard UK MAG-VIMS team The Cassini VIMS team Nicholas Achilleos, Chris Arridge, Robert Brown, Kevin Baines, Sarah Badman, Emma Bunce, Stan Bonnie Buratti, Roger Clark, Cowley, Michele Dougherty, Laurent Christophe Sotin, Phil Lamy, Makenzie Lystrup, Henrik Nicholson and Pierre Drossart Melin, Steve Miller, Dean Talboys Cassini/VIMS observations of the infrared aurora Tom Stallard Atmospheric windows Cassini/VIMS observations of the infrared aurora Tom Stallard Atmospheric windows Cassini/VIMS observations of the infrared aurora Tom Stallard UV IR + + + + H2 H2 = H2 H2 + H2 = H3 … … … H3 1 2 3 Cassini/VIMS observations of the infrared aurora Tom Stallard Gas Giant Upper Atmosphere Temperatures Jupiter Saturn Uranus Neptune Tobs 940 400-800 600-800 600 Tcalc 203 177 138 132 Cassini/VIMS observations of the infrared aurora Tom Stallard Mauna Kea, Hawaii Cassini/VIMS observations of the infrared aurora Tom Stallard NASA InfraRed Telescope Facility (IRTF) Cassini/VIMS observations of the infrared aurora Tom Stallard Cassini/VIMS observations of the infrared aurora Tom Stallard T = 400K Cassini/VIMS observations of the infrared aurora Tom Stallard Cassini/VIMS observations of the infrared aurora Tom Stallard Bright Polar Aurora 24 May 2007 04:43UT 08:49UT Cassini/VIMS observations of the infrared aurora Tom Stallard Thermal emission Auroral emission - methane absorbs sunlight Reflected sunlight Cassini/VIMS observations of the infrared aurora Tom Stallard Cassini/VIMS observations of the infrared aurora Tom Stallard Cassini/VIMS observations of the infrared aurora Tom Stallard Cassini/VIMS observations of the infrared aurora Tom Stallard.