Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/38975
Title: Dual periodicities in the flapping of Saturn's magnetodisk
Authors: Szego, K.
Nemeth, Z.
Foldy, L.
Cowley, S. W. H.
Provan, G.
First Published: 6-Jun-2013
Publisher: American Geophysical Union (AGU), Wiley
Citation: Journal of Geophysical Research: Space Physics, 2013, 118 (6), pp. 2883-2887 (5)
Abstract: In this report, we modify the model of Arridge et al. (2011) which was proposed to describe the shape of the magnetodisk of Saturn and its north-south oscillations near the planetary rotation period. The modification is based on the recent results of Provan et al. (2011, 2012) and Andrews et al. (2012), who have shown that the magnetic modulations near the current sheet exhibit dual periodicities, and derived magnetic phase functions for the northern and southern period modulations from the magnetic field data. Using a modified model in which the effects of both modulations are included, specifically related to the modulations of the radial component of the magnetic field, we show that the oscillations can be modeled without the use of an arbitrarily assigned oscillation phase value as employed in the previous work of Szego et al. (2012). In addition, the best fit amplitudes of the two oscillations are found to be nearly constant for a majority of the magnetodisk data analyzed, such that a single model with one fixed parameter fits well to the data for a majority of the passes.
DOI Link: 10.1002/jgra.50316
ISSN: 2169-9402
eISSN: 2169-9402
Links: http://onlinelibrary.wiley.com/doi/10.1002/jgra.50316/abstract
http://hdl.handle.net/2381/38975
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Creative Commons “Attribution Non-Commercial No Derivatives” licence CC BY-NC-ND, further details of which can be found via the following link: http://creativecommons.org/licenses/by-nc-nd/4.0/ Archived with reference to SHERPA/RoMEO and publisher website.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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