Jupiter's Whistler‐Mode Belts and Electron Slot Region
Abstract The spatial distribution of whistler‐mode wave emissions in the Jovian magnetosphere measured during the first 45 perijove orbits of Juno is investigated. A double‐belt structure in whistler‐mode wave intensity is revealed. Between the two whistler‐mode belts, there exists a region devoid of 100 s keV electrons near the magnetic equator at . Insufficient source electron population in such an electron “slot” region is a possible explanation for the relatively lower wave activity compared to the whistler‐mode belts. The wave intensity of the outer whistler‐mode belt measured in the dusk‐premidnight sector is significantly stronger than in the postmidnight‐dawn sector. We suggest that the inherent dawn‐dusk asymmetries in source electron distribution and/or auroral hiss emission rather than the modulation of solar cycle are more likely to result in the azimuthal variation of outer whistler‐mode belt intensity during the first 45 Juno perijove orbits.
Authors
- R. B. Horne (ORCID: https://orcid.org/0000-0002-0412-6407)
- T. F. Averkamp (ORCID: https://orcid.org/0000-0001-6977-3472)
- P. Kollmann (ORCID: https://orcid.org/0000-0002-4274-9760)
- N. Krupp (ORCID: https://orcid.org/0000-0003-4683-9533)
- Alexander Drozdov (ORCID: https://orcid.org/0000-0002-5334-2026)
- E. E. Woodfield (ORCID: https://orcid.org/0000-0002-0531-8814)
- Yixin Hao (ORCID: https://orcid.org/0000-0003-0425-3358)
- Dedong Wang (ORCID: https://orcid.org/0000-0002-4213-4037)
- Zhi‐Yang Liu (ORCID: https://orcid.org/0000-0003-3800-1044)
- J. D. Menietti (ORCID: https://orcid.org/0000-0001-6737-251X)
- Yuri Shprits (ORCID: https://orcid.org/0000-0002-9625-0834)
- S. J. Bolton (ORCID: https://orcid.org/0000-0002-9115-0789)
- E. Roussos (ORCID: https://orcid.org/0000-0002-5699-0678)
- G. B. Hospodarsky (ORCID: https://orcid.org/0000-0001-9200-9878)
Institutions
- University of Iowa (US)
- Southwest Research Institute (US)
- Centre National de la Recherche Scientifique (FR)
- British Antarctic Survey (GB)
- Université Toulouse III - Paul Sabatier (FR)
- University of California, Los Angeles (US)
- University of Potsdam (DE)
- Johns Hopkins University Applied Physics Laboratory (US)
- Max Planck Institute for Solar System Research (DE)
- GFZ Helmholtz Centre for Geosciences (DE)
Publication Details
- Journal
- Journal of Geophysical Research Space Physics
- Published
- 2024-12-01
- DOI
- https://doi.org/10.1029/2024ja032850
- Citations
- 5
- Primary Topic
- Astro and Planetary Science
- Type
- article
- Field-Weighted Citation Impact
- 1.66
Funders
- National Aeronautics and Space Administration
- Sight Research UK
- Natural Environment Research Council
- Science and Technology Facilities Council