Infrared Auroral Emissions Driven by Resonant Electron Impact Excitation of NO Molecules

Details Infrared Auroral Emissions Driven by Resonant Electron Impact Excitation of NO Molecules Infrared Auroral Emissions Driven by Resonant Electron Impact Excitation of NO Molecules

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3110103c&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 10, CiteID L10103

Physics

7

Atmospheric Composition And Structure: Airglow And Aurora, Atmospheric Composition And Structure: Thermosphere-Energy Deposition, Atmospheric Composition And Structure: Transmission And Scattering Of Radiation

Scientific paper

Although only a minor constituent of the earth's upper atmosphere, nitric oxide (NO) plays a major role in infrared auroral emissions due to radiation from vibrationally excited (NO*) states. The main process leading to the production of these excited molecules was thought to be chemiluminescence, whereby excited nitrogen atoms interact with oxygen molecules to form vibrationally excited nitric oxide (NO*) and atomic oxygen. Here we show evidence that a different production mechanism for NO*, due to low energy electron impact excitation of NO molecules, is responsible for more than 30% of the NO auroral emission near 5 μm.

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