Physics
Scientific paper
Jul 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3413105c&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 13, CiteID L13105
Physics
27
Planetary Sciences: Fluid Planets: Magnetospheres (2756), Planetary Sciences: Fluid Planets: Interactions With Particles And Fields, Planetary Sciences: Solar System Objects: Venus, Radio Science: Magnetospheric Physics (2700)
Scientific paper
The periodicities in electrons observed in Saturn's magnetosphere are examined using the new longitude system based on a drifting signal of Saturn kilometric radiation (SKR). When averaged into longitude and range bins over 50-day time periods, 28-48 keV electron intensities clearly evidence patterns that peak at successively increasing longitudes with increasing radial distance from Saturn. That is, the electrons form a spiral pattern in the quasi-corotational frame of SKR longitude. The spiral has only one ``arm'' that extends from ~10 RS to as far as ~60 RS from the planet (where 1 RS = 60268 km); the ``arm'' migrates an average of ~3.4° in longitude for every RS of radial distance. The spiral does not remain fixed in SKR longitude, but changes its relative position on time scales of ~50 days. The ``base'' of one spiral appears connected with a postulated convection outflow at ~330° longitude.
Carbary James F.
Krimigis Stamatios M.
Krupp Norbert
Mitchell Donald G.
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