Comparing Electron Energetics and UV Brightness in Jupiter's Northern Polar Region During Juno Perijove 5

Comparing Electron Energetics and UV Brightness in Jupiter's Northern Polar Region During Juno Perijove 5

We compare electron and UV observations mapping to the same location in Jupiter's northern polar region, poleward of the main aurora, during Juno perijove 5. Simultaneous peaks in UV brightness and electron energy flux are identified when observations map to the same location at the same time....

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Veröffentlicht in:Geophysical research letters. - 1984. - 46(2019), 1 vom: 16. Jan., Seite 19-27
1. Verfasser: Ebert, R W (VerfasserIn)
Weitere Verfasser: Greathouse, T K, Clark, G, Allegrini, F, Bagenal, F, Bolton, S J, Connerney, J E P, Gladstone, G R, Imai, M, Hue, V, Kurth, W S, Levin, S, Louarn, P, Mauk, B H, McComas, D J, Paranicas, C, Szalay, J R, Thomsen, M F, Valek, P W, Wilson, R J
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2019
Zugriff auf das übergeordnete Werk:Geophysical research letters
Schlagworte:Journal Article Juno Jupiter's aurora electron energy flux polar UV emissions polar auroral region precipitating electrons
Beschreibung
Zusammenfassung:We compare electron and UV observations mapping to the same location in Jupiter's northern polar region, poleward of the main aurora, during Juno perijove 5. Simultaneous peaks in UV brightness and electron energy flux are identified when observations map to the same location at the same time. The downward energy flux during these simultaneous observations was not sufficient to generate the observed UV brightness; the upward energy flux was. We propose that the primary acceleration region is below Juno's altitude, from which the more intense upward electrons originate. For the complete interval, the UV brightness peaked at ~240 kilorayleigh (kR); the downward and upward energy fluxes peaked at 60 and 700 mW/m2, respectively. Increased downward energy fluxes are associated with increased contributions from tens of keV electrons. These observations provide evidence that bidirectional electron beams with broad energy distributions can produce tens to hundreds of kilorayleigh polar UV emissions
Beschreibung:Date Revised 06.10.2023
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:0094-8276
DOI:10.1029/2018GL081129