Energetic charged particle observations during Juno's close flyby of Ganymede
Files
Accepted version
Date
2022-12-16
Authors
Clark, G.
Kollmann, P.
Mauk, B.H.
Paranicas, C.
Haggerty, D.
Rymer, A.
Smith, H.T.
Saur, J.
Allegrini, F.
Duling, S.
Version
Accepted manuscript
OA Version
Citation
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. 2022. "Energetic Charged Particle Observations During Juno's Close Flyby of Ganymede" Geophysical Research Letters, Volume 49, Issue 23. https://doi.org/10.1029/2022gl098572
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.