Modulation of the Ion Moments by the SKR Periodicity in the Outer Magnetosphere of Saturn

Details Modulation of the Ion Moments by the SKR Periodicity in the Outer Magnetosphere of Saturn Modulation of the Ion Moments by the SKR Periodicity in the Outer Magnetosphere of Saturn

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm11a2006n&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM11A-2006

Physics

Plasma Physics

[2700] Magnetospheric Physics, [5737] Planetary Sciences: Fluid Planets / Magnetospheres, [6275] Planetary Sciences: Solar System Objects / Saturn, [7800] Space Plasma Physics

Scientific paper

One of the most striking features of the Kronian magnetosphere is that it displays rotational modulation effects and the periodicity of these effects is the same as that of the Saturn Kilometric Radiation (SKR) - a radio emission originating from the planet. The SKR periodicity was observed in magnetic field, as well as in particle measurements, even in the outer magnetosphere. This periodicity modulates the plasma environment of the Kronian satellites, and strongly influences the moon-magnetosphere interactions, but its properties and origin are not completely understood yet. In this contribution we used ion moments derived from the data of the Cassini Plasma Spectrometer to investigate the SKR periodicity of the ion component of the magnetospheric plasma. Our analysis covers the time of the mission from the orbit insertion (SOI) up to 2011. We used the SKR SLS4 longitude system, and analyzed the data in the south and north SKR system as well. We found that the ion moments of the heavy and the light ions also are modulated by the SKR periodicity.

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