Hydrogen emissions in the polar cleft

Details Hydrogen emissions in the polar cleft Hydrogen emissions in the polar cleft

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jatp...47.1051h&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 47, Nov. 1985, p. 1051-1056.

Physics

9

Auroral Spectroscopy, Emission Spectra, H Lines, Polar Regions, Daytime, H Alpha Line, H Beta Line, Night Sky, Particle Precipitation, Protons

Scientific paper

Observation of H-alpha emissions in the polar clefts, obtained at Heiss Island and Longyearbyen, are analyzed. The influence of Rayleigh scattered sunlight on detection of H-alpha and H-beta emissions is studied. Narrow H-alpha profiles of dayside aurora in the wavelength region of 6554-6569 A, dayside cleft auroral spectrum in the wavelength range of 5850-6580 A, and board nightside aurora emissions profile are presented. A comparison of nightside and dayside proton precipitation reveals the nightside precipitation is more energetic than dayside proton precipitation; therefore, board emission profiles are characteristic of high energy primary precipitation. The ability of low energy protons to generate H-alpha emissions is investigated.

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