Energetic Charged Particle Observations During Juno's Close Flyby of Ganymede

G. Clark; P. Kollmann; B. H. Mauk; C. Paranicas; D. Haggerty; A. Rymer; H. T. Smith; J. Saur; F. Allegrini; S. Duling; R. W. Ebert; W. S. Kurth; R. Gladstone; T. K. Greathouse; W. Li; F. Bagenal; J. E.P. Connerney; S. Bolton; J. R. Szalay; A. H. Sulaiman; C. J. Hansen; D. L. Turner

doi:10.1029/2022GL098572

Energetic Charged Particle Observations During Juno's Close Flyby of Ganymede

G. Clark, P. Kollmann, B. H. Mauk, C. Paranicas, D. Haggerty, A. Rymer, H. T. Smith, J. Saur, F. Allegrini, S. Duling, R. W. Ebert, W. S. Kurth, R. Gladstone, T. K. Greathouse, W. Li, F. Bagenal, J. E.P. Connerney, S. Bolton, J. R. Szalay, A. H. SulaimanC. J. Hansen, D. L. Turner

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Abstract

On 7 June 2021, NASA's Juno mission obtained unique measurements of Ganymede's magnetosphere during a close flyby that brought the spacecraft within ∼1,000 km of its surface. Here Jupiter Energetic particle Detector Instrument observations are presented and analyzed. The electron pitch angle distributions reveal distinct regions of Ganymede's magnetosphere that can be characterized as inbound and outbound magnetospheric boundaries, a magnetotail/wake region, and Ganymede's open field line region. Evidence for energy dependent electron pitch angle structuring is also documented both outside and within Ganymede's magnetosphere. Electron precipitation is observed and mapped to Ganymede's surface along Juno's magnetic footpoint.

Original language	English (US)
Article number	e2022GL098572
Journal	Geophysical Research Letters
Volume	49
Issue number	23
DOIs	https://doi.org/10.1029/2022GL098572
State	Published - Dec 16 2022
Externally published	Yes

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© 2022 American Geophysical Union. All Rights Reserved.

Keywords

Ganymede
JEDI
Juno
energetic particles
mini-magnetosphere
moon-magnetosphere interaction

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10.1029/2022GL098572

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Clark, G., Kollmann, P., Mauk, B. H., Paranicas, C., Haggerty, D., Rymer, A., Smith, H. T., Saur, J., Allegrini, F., Duling, S., Ebert, R. W., Kurth, W. S., Gladstone, R., Greathouse, T. K., Li, W., Bagenal, F., Connerney, J. E. P., Bolton, S., Szalay, J. R., ... Turner, D. L. (2022). Energetic Charged Particle Observations During Juno's Close Flyby of Ganymede. Geophysical Research Letters, 49(23), Article e2022GL098572. https://doi.org/10.1029/2022GL098572

Clark, G, Kollmann, P, Mauk, BH, Paranicas, C, Haggerty, D, Rymer, A, Smith, HT, Saur, J, Allegrini, F, Duling, S, Ebert, RW, Kurth, WS, Gladstone, R, Greathouse, TK, Li, W, Bagenal, F, Connerney, JEP, Bolton, S, Szalay, JR, Sulaiman, AH, Hansen, CJ & Turner, DL 2022, 'Energetic Charged Particle Observations During Juno's Close Flyby of Ganymede', Geophysical Research Letters, vol. 49, no. 23, e2022GL098572. https://doi.org/10.1029/2022GL098572

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abstract = "On 7 June 2021, NASA's Juno mission obtained unique measurements of Ganymede's magnetosphere during a close flyby that brought the spacecraft within ∼1,000 km of its surface. Here Jupiter Energetic particle Detector Instrument observations are presented and analyzed. The electron pitch angle distributions reveal distinct regions of Ganymede's magnetosphere that can be characterized as inbound and outbound magnetospheric boundaries, a magnetotail/wake region, and Ganymede's open field line region. Evidence for energy dependent electron pitch angle structuring is also documented both outside and within Ganymede's magnetosphere. Electron precipitation is observed and mapped to Ganymede's surface along Juno's magnetic footpoint.",

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author = "G. Clark and P. Kollmann and Mauk, {B. H.} and C. Paranicas and D. Haggerty and A. Rymer and Smith, {H. T.} and J. Saur and F. Allegrini and S. Duling and Ebert, {R. W.} and Kurth, {W. S.} and R. Gladstone and Greathouse, {T. K.} and W. Li and F. Bagenal and Connerney, {J. E.P.} and S. Bolton and Szalay, {J. R.} and Sulaiman, {A. H.} and Hansen, {C. J.} and Turner, {D. L.}",

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doi = "10.1029/2022GL098572",

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AU - Kollmann, P.

AU - Mauk, B. H.

AU - Paranicas, C.

AU - Haggerty, D.

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AU - Smith, H. T.

AU - Saur, J.

AU - Allegrini, F.

AU - Duling, S.

AU - Ebert, R. W.

AU - Kurth, W. S.

AU - Gladstone, R.

AU - Greathouse, T. K.

AU - Li, W.

AU - Bagenal, F.

AU - Connerney, J. E.P.

AU - Bolton, S.

AU - Szalay, J. R.

AU - Sulaiman, A. H.

AU - Hansen, C. J.

AU - Turner, D. L.

PY - 2022/12/16

Y1 - 2022/12/16

N2 - On 7 June 2021, NASA's Juno mission obtained unique measurements of Ganymede's magnetosphere during a close flyby that brought the spacecraft within ∼1,000 km of its surface. Here Jupiter Energetic particle Detector Instrument observations are presented and analyzed. The electron pitch angle distributions reveal distinct regions of Ganymede's magnetosphere that can be characterized as inbound and outbound magnetospheric boundaries, a magnetotail/wake region, and Ganymede's open field line region. Evidence for energy dependent electron pitch angle structuring is also documented both outside and within Ganymede's magnetosphere. Electron precipitation is observed and mapped to Ganymede's surface along Juno's magnetic footpoint.

AB - On 7 June 2021, NASA's Juno mission obtained unique measurements of Ganymede's magnetosphere during a close flyby that brought the spacecraft within ∼1,000 km of its surface. Here Jupiter Energetic particle Detector Instrument observations are presented and analyzed. The electron pitch angle distributions reveal distinct regions of Ganymede's magnetosphere that can be characterized as inbound and outbound magnetospheric boundaries, a magnetotail/wake region, and Ganymede's open field line region. Evidence for energy dependent electron pitch angle structuring is also documented both outside and within Ganymede's magnetosphere. Electron precipitation is observed and mapped to Ganymede's surface along Juno's magnetic footpoint.

KW - Ganymede

KW - JEDI

KW - Juno

KW - energetic particles

KW - mini-magnetosphere

KW - moon-magnetosphere interaction

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Energetic Charged Particle Observations During Juno's Close Flyby of Ganymede

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