Cold and Hot Electron Populations Observed by <i>Juno</i> ‐JADE in the Jovian Magnetodisc
Abstract Despite their importance to a variety of plasma processes in Jupiter's magnetosphere, properties of the thermal and suprathermal electrons have been sparsely reported in past literature. To address this gap, we used data from Juno 's Jovian Auroral Distributions Experiment Electron sensors to survey electron properties in Jupiter's magnetodisc between M‐shells of M = 9–40 and magnetic latitudes less than 20° within years 2016–2023. We fit the electron measurements with a sum of two anisotropic kappa distributions and provide estimates of the electron density, temperature, anisotropy, and thermodynamic kappa for the cold and hot populations, separately. We find that the electron temperature increases non‐adiabatically with M‐shell and the cold electron temperature anisotropy is most extreme near M = 15. We also provide estimates of the ambient electron properties near the Galilean moons, which should be treated with caution considering the many caveats of the fitting process, which is often associated with large uncertainties.
Authors
- A. R. Poppe (ORCID: https://orcid.org/0000-0001-8137-8176)
- Jianzhao Wang (ORCID: https://orcid.org/0000-0002-0259-1858)
- Leng Ying Khoo (ORCID: https://orcid.org/0000-0003-0412-1064)
- Quentin Nénon (ORCID: https://orcid.org/0000-0001-8130-9832)
- Joachim Saur (ORCID: https://orcid.org/0000-0003-1413-1231)
- P. Kollmann (ORCID: https://orcid.org/0000-0002-4274-9760)
- F. Allegrini (ORCID: https://orcid.org/0000-0003-0696-4380)
- F. Bagenal (ORCID: https://orcid.org/0000-0002-3963-1614)
- W. S. Kŭrth (ORCID: https://orcid.org/0000-0002-5471-6202)
- Stephan Schlegel (ORCID: https://orcid.org/0000-0002-4779-2813)
- Y. Sarkango (ORCID: https://orcid.org/0000-0001-7812-7464)
- Zhi‐Yang Liu (ORCID: https://orcid.org/0000-0003-3800-1044)
- A. H. Sulaiman (ORCID: https://orcid.org/0000-0002-0971-5016)
- R. W. Ebert (ORCID: https://orcid.org/0000-0002-2504-4320)
- G. Livadiotis (ORCID: https://orcid.org/0000-0002-7655-6019)
- Nicolás André (ORCID: https://orcid.org/0000-0001-8017-5676)
- D. J. McComas (ORCID: https://orcid.org/0000-0001-6160-1158)
- J. R. Szalay (ORCID: https://orcid.org/0000-0003-2685-9801)
Institutions
- University of Iowa (US)
- Southwest Research Institute (US)
- Centre National de la Recherche Scientifique (FR)
- University of Minnesota (US)
- Université Toulouse III - Paul Sabatier (FR)
- Université Fédérale de Toulouse Midi-Pyrénées (FR)
- University of Cologne (DE)
- University of Colorado Boulder (US)
- Institut Superieur de l'Aeronautique et de l'Espace (ISAE-SUPAERO) (FR)
- Princeton University (US)
- Johns Hopkins University Applied Physics Laboratory (US)
- Laboratory for Atmospheric and Space Physics (US)
- Institut de Recherche en Astrophysique et Planétologie (FR)
- The University of Texas at San Antonio (US)
- University of California, Berkeley (US)
Publication Details
- Journal
- Geophysical Research Letters
- Published
- 2025-09-09
- DOI
- https://doi.org/10.1029/2025gl118209
- Citations
- 2
- Primary Topic
- Astro and Planetary Science
- Type
- article
- Field-Weighted Citation Impact
- 2.31
Funders
- National Aeronautics and Space Administration
- Centre National d’Etudes Spatiales
- Nuclear Safety and Security Commission