Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p11h..02d&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #P11H-02
Physics
[5704] Planetary Sciences: Fluid Planets / Atmospheres, [5706] Planetary Sciences: Fluid Planets / Aurorae, [6275] Planetary Sciences: Solar System Objects / Saturn
Scientific paper
In November 2010 Cassini camera observed the best visible spectrum of Saturn aurora to date. Aurora is now seen changing with time in nine different filters, including UV (240-280 nm and 300-380 nm bands). The data suggest that brighter aurora penetrates deeper in the atmosphere than the average aurora. We will discuss correlation of visible aurora with UV aurora observed by UVIS instrument in several past observations. New estimates of the energies, timing, and depth of visible lightning flashes in unpublished 2009 data will be presented. Some of these flashes appear simultaneously (within 15 seconds) in different parts of the same 3000-km-scale cloud. The flash timing is correlated with the radio signals (Saturn Electrostatic discharges, or SEDs) detected by the RPWS instrument. We will discuss how optical energy of the lightning is related to the SED energy, to the total energy released by the lightning flash, and to the convective powers of lightning storms on Saturn.
Dyudina Ulyana
Ewald Shawn P.
Fischer Guntram
Ingersoll P. A. P. A.
Porco Carolyn C.
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