"Bar Code" Events in the Juno-UVS Data: A Signature ~10 MeV Electron Microbursts at Jupiter

Bonfond, Bertrand; Gladstone, G. R.; Grodent, Denis; Gérard, Jean-Claude; Greathouse, T. K.; Hue, V.; Kammer, J. A.; Versteeg, M. H.; Davis, M. W.; Becker, H. N.; Radioti, Aikaterini; Elliott, S. S.; Imai, M.; Paranicas, C. P.; Bolton, S. J.; Levin, S. M.; Connerney, J. E. P.

doi:10.1029/2018GL080490

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"Bar Code" Events in the Juno-UVS Data: A Signature ~10 MeV Electron Microbursts at Jupiter

Bonfond, Bertrand; Gladstone, G. R.; Grodent, Denis et al.

2018 • In Geophysical Research Letters, 0 (ja)

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https://hdl.handle.net/2268/229352

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10.1029/2018GL080490

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Keywords :

aurora; Juno; Juno-UVS; Jupiter; radiation; relativistic electrons

Abstract :

[en] One of the most intriguing discoveries of Juno is the quasi-systematic detection of up-going electrons above the auroral regions. Here we discuss a byproduct of the most energetic component of this population: a contamination resembling bar codes in the Juno-UVS images. This pattern is likely caused by bursts of >10 MeV electrons penetrating the instrument. These events are mostly detected when Juno's magnetic footprint is located poleward of the main emission relative to the magnetic pole. The signal is not periodic, but the bursts are typically 0.1-1 second apart. They are essentially detected when Juno-UVS is oriented towards Jupiter, indicating that the signal is due to up-going electrons. The event detections occur between 1 and 7 Jovian radii above the 1 bar level, suggesting that the electron acceleration takes place close to Jupiter and is thus both strong and brief.

Research Center/Unit :

STAR - Space sciences, Technologies and Astrophysics Research - ULiège

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

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

Gladstone, G. R.

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

Gérard, Jean-Claude ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)

Greathouse, T. K.

Hue, V.

Kammer, J. A.

Versteeg, M. H.

Davis, M. W.

Becker, H. N.

More authors (7 more)

Language :

English

Title :

"Bar Code" Events in the Juno-UVS Data: A Signature ~10 MeV Electron Microbursts at Jupiter

Publication date :

2018

Journal title :

Geophysical Research Letters

ISSN :

0094-8276

eISSN :

1944-8007

Publisher :

Wiley, Washington, United States - District of Columbia

Volume :

Issue :

Peer reviewed :

Peer Reviewed verified by ORBi

Funders :

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

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