The ultraviolet spectrum of an aurora 530-1520 A

Details The ultraviolet spectrum of an aurora 530-1520 A The ultraviolet spectrum of an aurora 530-1520 A

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.2453f&link_type=abstract

Journal of Geophysical Research, vol. 87, Apr. 1, 1982, p. 2453-2458.

Physics

35

Airglow, Atmospheric Attenuation, Auroral Arcs, Far Ultraviolet Radiation, Nitrogen, Spectral Resolution, Ultraviolet Spectra, Atomic Spectra, Electron Transitions, Emission Spectra, Molecular Spectra, Spectrum Analysis

Scientific paper

Ultraviolet spectra between 530 and 1520 A of an active auroral arc were obtained at 6.5-A instrumental resolution. Several new emission features are identified, including several bands of the N2 Birge-Hopfield (1, v-double-prime) progression and numerous N I multiplets, the latter being preponderant at low altitudes. The improved instrumental resolution over previous experiments in the wavelength region below 1200 A allows for a partial resolution of the complex structure between 900 and 1100 A reported in earlier work. The ratio of O I 1356 to N2 Lyman-Birge-Hopfield is smaller than in the dayglow at a similar altitude, and this is interpreted as evidence for a depletion of atomic oxygen in the auroral ionosphere relative to mid-latitude composition.

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