Analysis of Ion Cyclotron Harmonics in the Saturn Downward Current Auroral Region

Details Analysis of Ion Cyclotron Harmonics in the Saturn Downward Current Auroral Region Analysis of Ion Cyclotron Harmonics in the Saturn Downward Current Auroral Region

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm23a1920m&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM23A-1920

Physics

Plasma Physics

[2756] Magnetospheric Physics / Planetary Magnetospheres, [7867] Space Plasma Physics / Wave/Particle Interactions

Scientific paper

Observations of relatively intense outgoing electron and ion beams have been reported during a pass by Cassini of a downward current auroral region,nearby a source region of Saturn kilometric radiation. Using the Cassini Radio and Plasma Wave Science (RPWS) instrument low frequency waveform receiver data we have been able to identify ion cyclotron harmonic waves associated with the particle beams. These observations indicate similarities with terrestrial auroral emissions, and may indicate a source of wave particle interactions. We fit the observed plasma distribution with drifting Maxwellians and perform a linear numerical analysis of plasma wave growth. We discuss the relevance of the results to possible electron and ion heating and acceleration.

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