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Title: Periodic motion of the magnetodisk as a cause of quasi-periodic variations in the Kronian magnetosphere
Authors: Nemeth, Z .
Szego, K.
Foldy, L.
Cowley, Stanley W. H.
Provan, G.
Thomsen, M.
First Published: 15-Jul-2016
Publisher: Elsevier
Citation: Planetary and Space Science, 2016, 130, pp. 54-59
Abstract: Most of the phenomena that describe the magnetized plasma filling the huge magnetosphere of Saturn exhibit periodic behavior. The fundamental period reflected in many magnetospheric phenomena is the rotational period of the planet, but the relationship is not at all trivial. In most cases clear periodic behavior can be found only for relatively short time intervals, and often even in these intervals abrupt phase-shifts occur and non-rotational frequencies appear. Several sophisticated methods have been developed to filter out interfering fluctuations and find the basic periodicity and phase of the variations. Although these methods proved to be very useful, some information is inevitably lost in the process. To recover this otherwise lost information we follow a different strategy to analyse the quasi-periodic variations of the plasma properties. We assume that the motion of the magnetodisk is periodic and that the observed quasi-periodic variations are due to the interplay of this periodic motion and the effects governing the spatial dependence of the plasma parameters (F), especially their dependence on the distance (d) from the central sheet of the magnetodisk. We found that relatively simple F(d) functions are able to reproduce the observed complex temporal dependence of the plasma properties.
DOI Link: 10.1016/j.pss.2016.07.002
ISSN: 0032-0633
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © the authors, 2016. This article is distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License ( ), which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
Description: The file associated with this record is embargoed until 12 months after the date of publication. The final published version may be available through the links above.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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