Influence of hot plasma pressure on the global structure of Saturn’s magnetodisk
Article first published online: 19 OCT 2010
Copyright 2010 by the American Geophysical Union.
Geophysical Research Letters
Volume 37, Issue 20, October 2010
How to Cite
2010), Influence of hot plasma pressure on the global structure of Saturn’s magnetodisk, Geophys. Res. Lett., 37, L20201, doi:10.1029/2010GL045159., , , , , , and (
- Issue published online: 19 OCT 2010
- Article first published online: 19 OCT 2010
- Manuscript Accepted: 15 SEP 2010
- Manuscript Revised: 9 SEP 2010
- Manuscript Received: 18 AUG 2010
- Saturn plasmadisk
 Using a model of force balance in Saturn's disk-like magnetosphere, we show that variations in hot plasma pressure can change the magnetic field configuration. This effect changes (i) the location of the magnetopause, even at fixed solar wind dynamic pressure, and (ii) the magnetic mapping between ionosphere and disk. The model uses equatorial observations as a boundary condition—we test its predictions over a wide latitude range by comparison with a Cassini high-inclination orbit of magnetic field and hot plasma pressure data. We find reasonable agreement over time scales larger than the period of Saturn kilometric radiation (also known as the camshaft period).