Probing Saturn's ion cyclotron waves on high-inclination orbits: Lessons for wave generation

Details Probing Saturn's ion cyclotron waves on high-inclination orbits: Lessons for wave generation Probing Saturn's ion cyclotron waves on high-inclination orbits: Lessons for wave generation

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jgra..11609235l&link_type=abstract

Journal of Geophysical Research, Volume 116, Issue A9, CiteID A09235

Physics

Magnetospheric Physics: Magnetosphere: Inner, Magnetospheric Physics: Magnetosphere Interactions With Satellites And Rings, Magnetospheric Physics: Plasma Waves And Instabilities (2471), Planetary Sciences: Solar System Objects: Saturn

Scientific paper

Ion cyclotron waves have been observed at Saturn by all spacecraft that passed through the inner magnetosphere near the equatorial plane, typically from slightly inside Enceladus' orbit to outside of Dione's. In 2005 and 2006, the Cassini spacecraft made high-inclination crossings of the equatorial plane in this region. The magnetometer observed that the waves were characteristically not uniform with distance from the equatorial plane. Instead, waves with weak and constant amplitude were observed in a small region around the magnetic equator where they propagated bidirectionally. Above and below that plane, the wave amplitude varied strongly, and the wave propagated away from the equator. We draw comparisons between these waves and those at the Earth and ion cyclotron waves associated with neutral sources in the Jovian magnetosphere. These behaviors may be common and should be considered when using the wave amplitude to infer the neutral ionization rates at Saturn, in other planetary magnetospheres, and at bodies in the solar wind.

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