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Title: Weakening of Jupiter's main auroral emission during January 2014
Authors: Badman, S. V.
Bonfond, B.
Fujimoto, M.
Gray, R. L.
Kasaba, Y.
Kasahara, S.
Kimura, T.
Melin, H.
Nichols, Jonathan D.
Steffl, A. J.
Tao, C.
Tsuchiya, F.
Yamazaki, A.
Yoneda, M.
Yoshikawa, I.
Yoshioka, K.
First Published: 10-Feb-2016
Publisher: Wiley, American Geophysical Union (AGU)
Citation: Geophysical Research Letters, 2016, 43 (3), pp. 988-997 (10)
Abstract: In January 2014 Jupiter's FUV main auroral oval decreased its emitted power by 70% and shifted equatorward by ∼1°. Intense, low-latitude features were also detected. The decrease in emitted power is attributed to a decrease in auroral current density rather than electron energy. This could be caused by a decrease in the source electron density, an order of magnitude increase in the source electron thermal energy, or a combination of these. Both can be explained either by expansion of the magnetosphere or by an increase in the inward transport of hot plasma through the middle magnetosphere and its interchange with cold flux tubes moving outward. In the latter case the hot plasma could have increased the electron temperature in the source region and produced the intense, low-latitude features, while the increased cold plasma transport rate produced the shift of the main oval.
DOI Link: 10.1002/2015GL067366
ISSN: 0094-8276
eISSN: 1944-8007
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2016. The Authors. This is an open access article under the terms of the Creative Commons Attribution License ( ), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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