Juno-UVS approach observations of Jupiter's auroras.pdf (1.8 MB)
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Juno-UVS approach observations of Jupiter's auroras.

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journal contribution
posted on 26.04.2018, 08:10 by G. R. Gladstone, M. H. Versteeg, T. K. Greathouse, V. Hue, M. W. Davis, J-C. Gérard, D. C. Grodent, B. Bonfond, Jonathan D. Nichols, R. J. Wilson, G. B. Hospodarsky, S. J. Bolton, S. M. Levin, J. E. P. Connerney, A. Adriani, W. S. Kurth, B. H. Mauk, P. Valek, D. J. McComas, G. S. Orton, F. Bagenal
Juno ultraviolet spectrograph (UVS) observations of Jupiter's aurora obtained during approach are presented. Prior to the bow shock crossing on 24 June 2016, the Juno approach provided a rare opportunity to correlate local solar wind conditions with Jovian auroral emissions. Some of Jupiter's auroral emissions are expected to be controlled or modified by local solar wind conditions. Here we compare synoptic Juno-UVS observations of Jupiter's auroral emissions, acquired during 3-29 June 2016, with in situ solar wind observations, and related Jupiter observations from Earth. Four large auroral brightening events are evident in the synoptic data, in which the total emitted auroral power increases by a factor of 3-4 for a few hours. Only one of these brightening events correlates well with large transient increases in solar wind ram pressure. The brightening events which are not associated with the solar wind generally have a risetime of ~2 h and a decay time of ~5 h.

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Citation

Geophysical Research Letters, 2017, 44 (15), pp. 7668-7675

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomy

Version

VoR (Version of Record)

Published in

Geophysical Research Letters

Publisher

American Geophysical Union

issn

0094-8276

eissn

1944-8007

Acceptance date

18/04/2017

Copyright date

2017

Available date

26/04/2018

Publisher version

https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2017GL073377

Language

en

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