Plasma Observations During the 7 June 2021 Ganymede Flyby From the Jovian Auroral Distributions Experiment (JADE) on Juno

F. Allegrini; F. Bagenal; R. W. Ebert; P. Louarn; D. J. McComas; J. R. Szalay; P. Valek; R. Wilson; S. J. Bolton; J. E. P. Connerney; G. Clark; S. Duling; W. S. Kurth; B. Mauk; J. Saur; J. H. Waite

doi:10.1029/2022GL098682

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Plasma Observations During the 7 June 2021 Ganymede Flyby From the Jovian Auroral Distributions Experiment (JADE) on Juno

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Plasma Observations During the 7 June 2021 Ganymede Flyby From the Jovian Auroral Distributions Experiment (JADE) on Juno

F. Allegrini, F. Bagenal, R. W. Ebert, P. Louarn, D. J. McComas, J. R. Szalay, P. Valek, R. Wilson, S. J. Bolton, J. E. P. Connerney, …

Geophysical research letters, Vol.49(23), e2022GL098682

12/16/2022

DOI: 10.1029/2022GL098682

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Abstract

We report on plasma observations from Juno/Jovian Auroral Distributions Experiment during the Ganymede flyby on 7 June 2021. Juno approached Ganymede from southern latitudes, passed through the wake region, then through its magnetosphere to closest approach (1,046 km from the surface) on the night side, and then back into Jupiter's plasma disk. We describe general plasma properties in the regions explored along the trajectory. We infer that Juno traversed a region of open field lines where one end intercepts Ganymede and the other Jupiter. The observations do not support Juno crossing into the closed field line region. The ion composition near Ganymede is very different than that of the nearby plasma environment. H-2(+) and H-3(+) ions were detected near Ganymede and in the wake region. Low energy (similar to 0.1-1 keV) electrons are enhanced just outside the magnetopause, in the wake (inbound trajectory) and in the magnetopause boundary layer (outbound trajectory).

Geology

Physical Sciences

Geosciences, Multidisciplinary

Science & Technology

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Title: Subtitle: Plasma Observations During the 7 June 2021 Ganymede Flyby From the Jovian Auroral Distributions Experiment (JADE) on Juno
Creators: F. Allegrini - Southwest Research Institute
F. Bagenal - Laboratory for Atmospheric and Space Physics
R. W. Ebert - Southwest Research Institute
P. Louarn - Institut de Recherche en Astrophysique et Planétologie
D. J. McComas - Princeton University
J. R. Szalay - Princeton University
P. Valek - Southwest Research Institute
R. Wilson - Laboratory for Atmospheric and Space Physics
S. J. Bolton - Southwest Research Institute
J. E. P. Connerney - Goddard Space Flight Center
G. Clark - Johns Hopkins University Applied Physics Laboratory
S. Duling - University of Cologne
W. S. Kurth - University of Iowa
B. Mauk - Johns Hopkins University Applied Physics Laboratory
J. Saur - University of Cologne
J. H. Waite - Southwest Research Institute
Resource Type: Journal article
Publication Details: Geophysical research letters, Vol.49(23), e2022GL098682
DOI: 10.1029/2022GL098682
ISSN: 0094-8276
eISSN: 1944-8007
Publisher: Amer Geophysical Union
Number of pages: 10
Grant note: 699041X / NASA New Frontiers Program for Juno, at the University of Iowa 699050X / NASA New Frontiers Program for Juno at the University of Colorado 884711 / European Research Council under the European Union's Horizon 2020 research and innovation programme; European Research Council (ERC) NNM06AA75C / NASA New Frontiers Program for Juno at Princeton University Southwest Research Institute
Language: English
Date published: 12/16/2022
Academic Unit: Physics and Astronomy
Record Identifier: 9984455550202771

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