Tethys and Dione as sources of outward-flowing plasma in Saturn’s magnetosphere

J. L. Burch, J. Goldstein, W. S. Lewis (), D. T. Young, A. J. Coates, M. K. Dougherty and N. André
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J. L. Burch: Southwest Research Institute, PO Drawer 28510, San Antonio, Texas, 78228-0510 USA
J. Goldstein: Southwest Research Institute, PO Drawer 28510, San Antonio, Texas, 78228-0510 USA
W. S. Lewis: Southwest Research Institute, PO Drawer 28510, San Antonio, Texas, 78228-0510 USA
D. T. Young: Southwest Research Institute, PO Drawer 28510, San Antonio, Texas, 78228-0510 USA
A. J. Coates: Mullard Space Science Laboratory, Holmbury St Mary, Dorking, Surrey, RH5 6NT, UK
M. K. Dougherty: Imperial College, Blackett Laboratory, London, SW7 2BZ, UK
N. André: ESA, 2200 AG Noordwijk, The Netherlands

Nature, 2007, vol. 447, issue 7146, 833-835

Abstract: In the shadow of Saturn The centrifugal forces caused by Saturn's rapid rotation are thought to fling dense cold plasma out into the Solar System, to be replaced by hotter more tenuous plasma flowing inward from the outer magnetosphere. New observations of electron flows and magnetic fields in the region of Saturn confirm that this centrifugal interchange of plasmas, similar to that already observed around Jupiter, does indeed occur here. The outward-flowing plasma originates from near the orbits of Dione and Tethys, supporting the idea that there are distinct rings of plasma associated with these two large icy satellites.

Date: 2007
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DOI: 10.1038/nature05906

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