Intervals of intense energetic electron beams over Jupiter's poles

Auroral phenomena; Energetic particles: precipitating; Aurorae; Jupiter; Charged particle motion and acceleration; MeV electron beams; Swirl region; Jovian aurora

Abstract :

[en] Juno's Jupiter Energetic particle Detector Instrument (JEDI) often detects energetic electron beams over Jupiter's polar regions. In this paper, we document a subset of intense magnetic field-aligned beams of energetic electrons moving away from Jupiter at high magnetic latitudes both north and south of the planet. The number fluxes of these beams are often dominated by electrons with energies above about 1 MeV. These very narrow beams can create broad angular responses in JEDI with unique signatures in the detector count rates, probably because of >10 MeV electrons. We use these signatures to identify the most intense beams. These beams occur primarily above the swirl region of the polar cap aurora. This polar region is described as being of low brightness and high absorption and the most magnetically "open" at Jupiter.

Research center :

STAR - Space sciences, Technologies and Astrophysics Research - ULiège

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Paranicas, C.

Mauk, B. H.

Haggerty, D. K.

Clark, G.

Kollmann, P.

Rymer, A.

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

Dunn, W.

Ebert, R.

Gladstone, G. R.

More authors (6 more)

Language :

English

Title :

Intervals of intense energetic electron beams over Jupiter's poles

Publication date :

08 March 2018

Journal title :

Journal of Geophysical Research. Space Physics

ISSN :

2169-9380

eISSN :

2169-9402

Publisher :

Wiley, Hoboken, United States - New Jersey

Volume :

123

Pages :

n/a-n/a

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://dx.doi.org/10.1002/2017JA025106

Funders :

BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]

Commentary :

2017JA025106

Available on ORBi :

since 15 March 2018

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