A Comprehensive Set of Juno In Situ and Remote Sensing Observations of the Ganymede Auroral Footprint

Hue, V.; Szalay, J. R.; Greathouse, T. K.; Bonfond, Bertrand; Kotsiaros, S.; Louis, C. K.; Sulaiman, A. H.; Clark, G.; Allegrini, F.; Gladstone, G. R.; Paranicas, C.; Versteeg, M. H.; Mura, A.; Moirano, A.; Gershman, D. J.; Bolton, S. J.; Connerney, J. E. P.; Davis, M. W.; Ebert, R. W.; Gérard, Jean-Claude; Giles, R. S.; Grodent, Denis; Imai, M.; Kammer, J. A.; Kurth, W. S.; Lamy, L.; Mauk, B. H.

doi:10.1029/2021gl096994

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A Comprehensive Set of Juno In Situ and Remote Sensing Observations of the Ganymede Auroral Footprint

Hue, V.; Szalay, J. R.; Greathouse, T. K. et al.

2022 • In Geophysical Research Letters, 49 (7)

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https://hdl.handle.net/2268/289478

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10.1029/2021gl096994

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Keywords :

General Earth and Planetary Sciences; Geophysics; Ganymede , Jupiter , Juno, footprint, flux tube, electron beam

Abstract :

[en] Jupiter's satellite auroral footprints are a manifestation of the satellite-magnetosphere interaction of the Galilean moons. Juno's polar elliptical orbit enables crossing the magnetic flux tubes connecting each Galilean moon with their associated auroral emission. Its payload allows measuring the fields and particle population in the flux tubes while remotely sensing their associated auroral emissions. During its thirtieth perijove, Juno crossed the flux tube directly connected to Ganymede's leading footprint spot, a unique event in the entire Juno prime mission. Juno revealed a highly-structured precipitating electron flux, up to 316 mW/m 2, while measuring both a small perturbation in the magnetic field azimuthal component and small Poynting flux with an estimated total downward current of 4.2 ± 1.2 kA. Based on the evolution of the footprint morphology and the field and particle measurements, Juno transited for the first time through a region connected to the transhemispheric electron beam of the Ganymede footprint.

Research center :

STAR - Space sciences, Technologies and Astrophysics Research - ULiège

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Hue, V. ; Southwest Research Institute San Antonio TX USA

Szalay, J. R. ; Department of Astrophysical Sciences Princeton University Princeton NJ USA

Greathouse, T. K. ; Southwest Research Institute San Antonio TX USA

Bonfond, Bertrand ; Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR)

Kotsiaros, S. ; National Space Institute Measurement and Instrumentation Systems DTU Kongens Lyngby Denmark

Louis, C. K. ; School of Cosmic Physics DIAS Dunsink Observatory Dublin Institute for Advanced Studies Dublin Ireland

Sulaiman, A. H. ; Department of Physics and Astronomy University of Iowa Iowa City IA USA

Clark, G. ; Johns Hopkins University Applied Physics Laboratory Laurel MD USA

Allegrini, F.; Southwest Research Institute San Antonio TX USA ; University of Texas at San Antonio San Antonio TX USA

Gladstone, G. R. ; Southwest Research Institute San Antonio TX USA ; University of Texas at San Antonio San Antonio TX USA

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Language :

English

Title :

A Comprehensive Set of Juno In Situ and Remote Sensing Observations of the Ganymede Auroral Footprint

Publication date :

05 April 2022

Journal title :

Geophysical Research Letters

ISSN :

0094-8276

eISSN :

1944-8007

Publisher :

American Geophysical Union (AGU)

Volume :

Issue :

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://onlinelibrary.wiley.com/doi/pdf/10.1029/2021GL096994

Funders :

BELSPO - Belgian Science Policy Office [BE]
JSPS - Japan Society for the Promotion of Science [JA]
SFI - Science Foundation Ireland [IE]
UI - University of Iowa [US-IA] [US-IA]
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]

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