Jupiter's Low-Altitude Auroral Zones: Fields, Particles, Plasma Waves, and Density Depletions
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F22%3A00560525" target="_blank" >RIV/68378289:_____/22:00560525 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/22:10456686
Result on the web
<a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022JA030334" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022JA030334</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2022JA030334" target="_blank" >10.1029/2022JA030334</a>
Alternative languages
Result language
angličtina
Original language name
Jupiter's Low-Altitude Auroral Zones: Fields, Particles, Plasma Waves, and Density Depletions
Original language description
The Juno spacecraft's polar orbits have enabled direct sampling of Jupiter's low-altitude auroral field lines. While various data sets have identified unique features over Jupiter's main aurora, they are yet to be analyzed altogether to determine how they can be reconciled and fit into the bigger picture of Jupiter's auroral generation mechanisms. Jupiter's main aurora has been classified into distinct ´zones´, based on repeatable signatures found in energetic electron and proton spectra. We combine fields, particles, and plasma wave data sets to analyze Zone-I and Zone-II, which are suggested to carry upward and downward field-aligned currents, respectively. We find Zone-I to have well-defined boundaries across all data sets. H+ and/or H-3(+) cyclotron waves are commonly observed in Zone-I in the presence of energetic upward H+ beams and downward energetic electron beams. Zone-II, on the other hand, does not have a clear poleward boundary with the polar cap, and its signatures are more sporadic. Large-amplitude solitary waves, which are reminiscent of those ubiquitous in Earth's downward current region, are a key feature of Zone-II. Alfvenic fluctuations are most prominent in the diffuse aurora and are repeatedly found to diminish in Zone-I and Zone-II, likely due to dissipation, at higher altitudes, to energize auroral electrons. Finally, we identify significant electron density depletions, by up to 2 orders of magnitude, in Zone-I, and discuss their important implications for the development of parallel potentials, Alfvenic dissipation, and radio wave generation.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
<a href="/en/project/LTAUSA17070" target="_blank" >LTAUSA17070: Electromagnetic waves in planetary ionospheres and magnetospheres</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Geophysical Research-Space Physics
ISSN
2169-9380
e-ISSN
2169-9402
Volume of the periodical
127
Issue of the periodical within the volume
8
Country of publishing house
US - UNITED STATES
Number of pages
24
Pages from-to
e2022JA030334
UT code for WoS article
000843443700001
EID of the result in the Scopus database
2-s2.0-85133543010