Evidence of Alfvénic Activity in Jupiter's Mid‐To‐High Latitude Magnetosphere

Lorch, C. T. S., Ray, L. C., Wilson, R. J., Bagenal, F., Crary, F., Delamere, P. A., Damiano, P. A., Watt, Clare and Allegrini, F. (2022) Evidence of Alfvénic Activity in Jupiter's Mid‐To‐High Latitude Magnetosphere. Journal of Geophysical Research: Space Physics, 127 (6). e2021JA029853. ISSN 2169-9380

JGR Space Physics - 2022 - Lorch - Evidence of Alfv nic Activity in Jupiter s Mid‐To‐High Latitude Magnetosphere.pdf - Published Version
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Official URL: https://doi.org/10.1029/2021ja029853


Using a combination of Juno magnetometer and plasma data, we show evidence of Alfvénic turbulence within the mid‐to‐high latitude magnetosphere with sufficient conditions to trigger auroral particle acceleration. We analyze 12 events that, in agreement with theoretical results, are found to be dissipative at the electron inertial scale. Furthermore, these events contain significant Poynting flux in the range ∼0.8–20 mW/m2 at ionospheric altitudes. This is sufficient to generate auroral emissions. We confirm that such events are incompressible, confirming their Alfvénicity, occur at dissipative scales, have intermittent features present and are multifractal in nature. These results illustrate the importance of turbulence in the mid‐to‐high latitudes of Jupiter's magnetosphere as a driver of particle acceleration.

Item Type: Article
Additional Information: Funding information: C.T.S. Lorch was funded by an STFC Studentship. L.C. Ray was funded by STFC Consolidated Grant ST/R000816/1 to Lancaster University. This work was supported by F. Bagenal and R.J. Wilson at the University of Colorado as a part NASA's Juno mission supported by NASA through contract 699050X with the Southwest Research Institute. P.A. Delamere was supported under the NASA grant NASA/80NSSC20K1279. P.A. Damiano was supported by NASA grant 80NSSC19K094. C.E.J. Watt was supported by STFC grants ST/W002078/1 and ST/W000369/1.
Subjects: F500 Astronomy
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: John Coen
Date Deposited: 31 May 2022 10:23
Last Modified: 31 May 2022 10:30
URI: http://nrl.northumbria.ac.uk/id/eprint/49227

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