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    Rights statement: An edited version of this paper was published by AGU. Copyright 2016 American Geophysical Union. Badman, S. V., et al. (2016), Weakening of Jupiter's main auroral emission during January 2014, Geophys. Res. Lett., 43, 988–997, doi:10.1002/2015GL067366. To view the published open abstract, go to http://dx.doi.org/10.1002/2015GL067366

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    Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License

  • Badman_et_al-2016-Geophysical_Research_Letters

    Rights statement: ©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.

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    Available under license: CC BY: Creative Commons Attribution 4.0 International License

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Weakening of Jupiter's main auroral emission during January 2014

Research output: Contribution to journalJournal article

Published
  • S.V. Badman
  • B. Bonfond
  • M. Fujimoto
  • Becky Gray
  • Y. Kasaba
  • S. Kasahara
  • T. Kimura
  • H. Melin
  • J.D. Nichols
  • A.J. Steffl
  • C. Tao
  • F. Tsuchiya
  • A. Yamazaki
  • M. Yoneda
  • I. Yoshikawa
  • K. Yoshioka
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<mark>Journal publication date</mark>16/02/2016
<mark>Journal</mark>Geophysical Research Letters
Issue number3
Volume43
Number of pages10
Pages (from-to)988-997
<mark>State</mark>Published
Early online date10/02/16
<mark>Original language</mark>English

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.

Bibliographic note

An edited version of this paper was published by AGU. Copyright 2016 American Geophysical Union.

Badman, S. V., et al. (2016), Weakening of Jupiter's main auroral emission during January 2014, Geophys. Res. Lett., 43, 988–997, doi:10.1002/2015GL067366. To view the published open abstract, go to http://dx.doi.org/10.1002/2015GL067366