N2(+) emissions in sunlit cusp and night-side aurora

Details N2(+) emissions in sunlit cusp and night-side aurora N2(+) emissions in sunlit cusp and night-side aurora

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984angeo...2..457h&link_type=abstract

Annales Geophysicae (ISSN 0755-0685), vol. 2, July-Aug. 1984, p. 457-462.

Physics

Auroral Spectroscopy, Cusps, Nightglow, Nitrogen, Electron Impact, Infrared Spectra, Molecular Excitation, Molecular Ions, Molecular Rotation, Molecular Spectra, Molecular Spectroscopy, Resonance Scattering

Scientific paper

The primary excitation mechanism in night-side auroras is ionizing excitation by electron impact. The first negative 1 NG and Meinel (M) bands are the only emissions which ground-based measurements have identified from N2(+). The total intensity of the M system is found to be stronger than that of the 1 NG system by a factor of 5. In the dayside, sunlit aurora resonance scattering plays a dominant role in the generation of the 1 NG bands with characteristic vibrational population, but the N2(+) M(2, 0), (3, 1), and (4, 2) bands are too weak to be detected, as predicted.

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