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

R. W. Ebert, T. K. Greathouse, G. Clark, F. Allegrini, F. Bagenal, S. J. Bolton, J. E.P. Connerney, G. R. Gladstone, M. Imai, V. Hue, W. S. Kurth, S. Levin, P. Louarn, B. H. Mauk, D. J. McComas, C. Paranicas, J. R. Szalay, M. F. Thomsen, P. W. Valek, R. J. Wilson

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)19-27
Number of pages9
JournalGeophysical Research Letters
Issue number1
StatePublished - Jan 16 2019

All Science Journal Classification (ASJC) codes

  • Geophysics
  • General Earth and Planetary Sciences


  • Juno
  • Jupiter's aurora
  • electron energy flux
  • polar UV emissions
  • polar auroral region
  • precipitating electrons


Dive into the research topics of 'Comparing Electron Energetics and UV Brightness in Jupiter's Northern Polar Region During Juno Perijove 5'. Together they form a unique fingerprint.

Cite this