Physics – Plasma Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm11a1991m&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SM11A-1991
Physics
Plasma Physics
[2772] Magnetospheric Physics / Plasma Waves And Instabilities, [5737] Planetary Sciences: Fluid Planets / Magnetospheres, [7867] Space Plasma Physics / Wave/Particle Interactions
Scientific paper
Whistler mode chorus plasma wave emissions have been observed at Saturn, particularly near the magnetic equator which appears to be the source region. In addition, chorus emissions with somewhat different characteristics are observed associated with plasma injection regions. All these chorus emissions are characterized by a fine structure, observed by the Cassini high resolution wideband receiver, which contains rapidly frequency-drifting components that are similar to those observed in terrestrial chorus emissions. Recent studies have shown that these inherently nonlinear structures can be reproduced in theory with a dependence on the wave amplitude. We will examine the chorus emission data frequency drift rates and compare them directly to those predicted by theoretical drift rate models. These studies should help us better understand the nonlinear character of the Saturn chorus emissions and possible differences between Saturn and terrestrial observations.
Gurnett Donald A.
Hospodarsky George B.
Menietti Douglas J.
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