Transient internally driven aurora at Jupiter discovered by Hisaki and the Hubble Space Telescope

Kimura, Tomoki; Badman, Sarah; Tao, Chihiro; Yoshioka, Kazuo; Murakami, Go; Yamazaki, Atsushi; Tsuchia, Fuminori; Bonfond, Bertrand; Steffl, Andrew; Masters, Adam; Kasahara, S; Hasegawa, H; Yoshikawa, I; Fujimoto, M; Clarke, John T.

doi:10.1002/2015GL063272

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Transient internally driven aurora at Jupiter discovered by Hisaki and the Hubble Space Telescope

Kimura, Tomoki; Badman, Sarah; Tao, Chihiro et al.

2015 • In Geophysical Research Letters, 42, p. 1662–1668

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https://hdl.handle.net/2268/180690

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10.1002/2015GL063272

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Keywords :

Jupiter; Hubble Space Telescope; Hisaki; Aurora

Abstract :

[en] Jupiter’s auroral emissions reveal energy transport and dissipation through the planet’s giant magnetosphere. While the main auroral emission is internally driven by planetary rotation in the steady state, transient brightenings are generally thought to be triggered by compression by the external solar wind. Here we present evidence provided by the new Hisaki spacecraft and the Hubble Space Telescope that shows that such brightening of Jupiter’s aurora can in fact be internally driven. The brightening has an excess power up to ~550 GW. Intense emission appears from the polar cap region down to latitudes around Io’s footprint aurora, suggesting a rapid energy input into the polar region by the internal plasma circulation process.

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Kimura, Tomoki

Badman, Sarah

Tao, Chihiro

Yoshioka, Kazuo

Murakami, Go

Yamazaki, Atsushi

Tsuchia, Fuminori

Bonfond, Bertrand ; Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)

Steffl, Andrew

Masters, Adam

More authors (5 more)

Language :

English

Title :

Transient internally driven aurora at Jupiter discovered by Hisaki and the Hubble Space Telescope

Publication date :

20 February 2015

Journal title :

Geophysical Research Letters

ISSN :

0094-8276

eISSN :

1944-8007

Publisher :

American Geophysical Union, Washington, United States - District of Columbia

Volume :

Pages :

1662–1668

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://reflexions.ulg.ac.be/OriginesAuroresJupiter
[en] http://reflexions.ulg.ac.be/en/OriginsJupiterAurorae

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