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Influence of hot plasma pressure on the global structure of Saturn's magnetodisk

Achilleos, N; Guio, P; Arridge, CS; Sergis, N; Wilson, RJ; Thomsen, MF; Coates, AJ; (2010) Influence of hot plasma pressure on the global structure of Saturn's magnetodisk. Geophysical Research Letters , 37 , Article L20201. 10.1029/2010GL045159. Green open access

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Abstract

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).

Type: Article
Title: Influence of hot plasma pressure on the global structure of Saturn's magnetodisk
Open access status: An open access version is available from UCL Discovery
DOI: 10.1029/2010GL045159
Publisher version: http://dx.doi.org/10.1029/2010GL045159
Language: English
Additional information: Copyright 2010 by the American Geophysical Union
Keywords: Force, Model
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics
URI: https://discovery.ucl.ac.uk/id/eprint/169666
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