On the Relation Between Jupiter's Aurora and the Dawnside Current Sheet

Xu, Yan and Yao, Z. H. and Zhang, B. and Delamere, P. A. and Ray, Licia C and Dunn, W. R. and Badman, Sarah and Feng, E. H. and Zheng, Z. Q. and Bolton, S. J. and Grodent, D. C. and Bonfond, B. . and Wei, Y. (2023) On the Relation Between Jupiter's Aurora and the Dawnside Current Sheet. Geophysical Research Letters, 50 (13). ISSN 0094-8276

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Jupiter's auroral emission is a spectacular phenomenon that provides insight into energy release processes related to the coupling of its magnetosphere and ionosphere. This energy release is influenced by solar wind conditions. Using joint observations from Juno and the Hubble Space Telescope (HST), we statistically investigate the relationship between auroral power and current sheet variations under different solar wind conditions. In this study, we reveal that during global main auroral brightening events that are closely connected to solar wind compressions, the dawn side current sheet is substantially thinner than during times when a quiet auroral morphology is present. Furthermore, the total current intensity in the current sheet is found to increase under solar wind compression conditions compared to the quiet period. These findings provide important observational evidence for how magnetospheric dynamics driven by solar wind behavior affect auroral activity, deepening our understanding of the coupling between Jupiter's magnetosphere and ionosphere.

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Journal Article
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Geophysical Research Letters
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13 Jul 2023 10:40
Last Modified:
17 Sep 2023 03:28