Superthermal electron processes in the upper atmosphere of Uranus - Aurora and electroglow

Details Superthermal electron processes in the upper atmosphere of Uranus - Aurora and electroglow Superthermal electron processes in the upper atmosphere of Uranus - Aurora and electroglow

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....9314295w&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Dec. 1, 1988, p. 14295-14308. Previously announced in STAR as N88-254

Physics

14

Auroras, Electron Density (Concentration), Luminescence, Mathematical Models, Temperature Profiles, Uranus Atmosphere, Electron Precipitation, Emission Spectra, Heating, Ultraviolet Radiation

Scientific paper

Strong ultraviolet emissions from the upper atmosphere of Uranus suggest that both auroral and electroglow phenomena are of significant aeronomical consequences in the structure of the upper atmosphere. Combined modeling and data analysis were performed to determine the effect of electroglow and auroral phenomena on the global heat and atomic hydrogen budgets in the Uranus upper atmosphere. The results indicate that the auroral and electroglow heat sources are not adequate to explain the high exospheric temperature observed at Uranus, but that the atomic hydrogen supplied by these processes is more than sufficient to explain the observations. The various superthermal electron distributions modeled have significantly different efficiencies for the various processes such as UV emission, heating, ionization, and atomic hydrogen production, and produce quite different H2 band spectra. However, additional information on the UV spectra and global parameters is needed before modeling can be used to distinguish between the possible mechanisms for electroglow.

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