Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/36267
Title: The origin of Saturn's magnetic periodicities: Northern and southern current systems
Authors: Southwood, D. J.
Cowley, Stanley William Herbert
First Published: 1-Mar-2014
Publisher: American Geophysical Union (AGU)
Citation: Journal of Geophysical Research: Space Physics , 2014, 119 (3), pp. 1563-1571 (9)
Abstract: The recent survey by Andrews et al. (2012) of the separate northern and southern ~10.7 h periodic magnetic signals in Saturn's magnetosphere limits very much their governing current systems. The existence of signals with pure or close to pure northern or southern periods in respective polar caps taken with the relatively narrow bandwidth of the signals indicates that the actual periodicities are imposed independently from northern and southern polar regions, i.e., the open field line regions. Field-aligned currents must flow on the boundaries of these regions to exclude signals from the other hemisphere. Equatorward of the polar cap, on closed magnetic shells, there are distinct north and south “cam” source currents, the distinction being made clear by a difference in polarization. We outline the consequences for the governing current systems and the implications for sustaining the energy and power dissipation in the system.
DOI Link: 10.1002/2013JA019632
ISSN: 2169-9380
eISSN: 2169-9402
Links: http://onlinelibrary.wiley.com/doi/10.1002/2013JA019632/abstract
http://hdl.handle.net/2381/36267
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright ©2014. American Geophysical Union. All Rights Reserved. Deposited in accordance with the Publisher's Usage Permissions.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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