Physics
Scientific paper
Jan 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91..321d&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Jan. 1, 1986, p. 321-327. Research supported by Johns Hopkins Univers
Physics
34
Auroral Spectroscopy, Electron Emission, Neutral Atmospheres, Ultraviolet Radiation, Electron Impact, Molecular Energy Levels, Nitrogen, Oxygen Atoms, Vegard-Kaplan Bands
Scientific paper
The relationship is examined between three important middle UV auroral emissions, the electron energy spectrum, and the neutral atmosphere. Calculated emission rates are displayed for the Vegard-Kaplan and second positive band systems of N2 and the OI (1S greater than 3P) 2972-angstrom line. All three features are proportional to the incoming energy flux, but they have different dependences on the characteristic energy of the incident electron spectrum and on the concentration of atomic oxygen. In principle, observations of the intensities of these features could be used to characterize the incident electron spectrum, but uncertainties in the chemistry of certain states of oxygen and nitrogen make this difficult. The uncertainties are discussed along with alternative far UV features (such as OI 1356 angstroms and 1304 angstroms and the N2 Lyman-Birge-Hopfield bands.
Daniell E. Jr. R.
Strickland Douglas J.
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