Journal article
Statistical Survey of Interchange Events in the Jovian Magnetosphere Using Juno Observations
Geophysical research letters, Vol.51(19), e2024GL110300
10/16/2024
DOI: 10.1029/2024GL110300
Abstract
Abstract Interchange instability is known to drive fast radial transport of electrons and ions in Jupiter's inner and middle magnetosphere. In this study, we conduct a statistical survey to evaluate the properties of energetic particles and plasma waves during interchange events using Juno data from 2016 to 2023. We present representative examples of interchange events followed by a statistical analysis of the spatial distribution, duration and spatial extent. Our survey indicates that interchange instability is predominant at M ‐shells from 6 to 26, peaking near 17 with an average duration of minutes and a corresponding M ‐shell width of <∼0.05. During interchange events, the associated plasma waves, such as whistler‐mode, Z‐mode, and electron cyclotron harmonic waves exhibit a distinct preferential location. These findings provide valuable insights into particle transport and the source region of plasma waves in the Jovian magnetosphere, as well as in other magnetized planets within and beyond our solar system.
Plain Language Summary The radial transport of plasma around a magnetized planet is crucial for understanding the underlying magnetospheric dynamics. Jupiter's magnetospheric dynamics are primarily dominated by the rapid rotation and plasma source from Io. This rapid rotation drives the interchange instability, where hot, low‐density plasma is moved toward the inner magnetosphere. During this process, the inward moving flux tube builds up magnetic pressure, potentially leading to the trapping of particles alongside plasma waves. In this study, we present several typical examples of interchange events, and conduct a statistical analysis to explore their spatial distribution, duration and spatial extent, as well as the typical features of the associated plasma waves. This survey provides insights into mass transport, the source of these plasma waves in Jupiter's magnetosphere, with potential implications for other magnetized planets within and beyond our solar system.
Key Points Our statistical survey indicates that interchange events occur over L (or M )‐shells ∼6–26 at Jupiter with a peak occurrence rate at M ∼ 17 During interchange events, various types of plasma waves are intensified, each exhibiting a distinct preferential location The duration and the corresponding spatial extent of interchange events are analyzed for multiple events
Details
- Title: Subtitle
- Statistical Survey of Interchange Events in the Jovian Magnetosphere Using Juno Observations
- Creators
- A. Daly - Boston UniversityW. Li - Boston UniversityQ. Ma - Boston UniversityX.‐C. Shen - Boston UniversityL. Capannolo - Boston UniversityS. Huang - Boston UniversityW. S. Kurth - University of IowaG. B. Hospodarsky - University of IowaB. H. Mauk - Johns Hopkins University Applied Physics LaboratoryG. Clark - Johns Hopkins University Applied Physics LaboratoryF. Allegrini - Southwest Research InstituteS. J. Bolton - Southwest Research Institute
- Resource Type
- Journal article
- Publication Details
- Geophysical research letters, Vol.51(19), e2024GL110300
- Publisher
- AMER GEOPHYSICAL UNION
- DOI
- 10.1029/2024GL110300
- ISSN
- 0094-8276
- eISSN
- 1944-8007
- Grant note
- Planetary Science Division: 699041X NASA: AGS-2225445
The research at Boston University is supported by the NASA Grant 80NSSC20K0557, Subcontract Q99064JAR under NASA Prime contract NNM06AA75C, and NSF Grant AGS-2402179. AD would like to acknowledge the NASA FINESST Grant 80NSSC23K1641. QM would like to acknowledge the NASA Grants 80NSSC20K0196, and 80NSSC24K0572, and the NSF Grant AGS-2225445. The work at UCLA was supported by the NASA subcontract 699046X under prime contract ZZM06AA75C. The research at the University of Iowa is supported by NASA through Contract 699041X with the Southwest Research Institute. WSK acknowledges the use of the Space Physics Data Repository at the University of Iowa supported by the Roy J. Carver Charitable Trust.
- Language
- English
- Date published
- 10/16/2024
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984721217002771
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