Observation of O+ 4P-4D0 lines in proton aurora over Svalbard

Details Observation of O+ 4P-4D0 lines in proton aurora over Svalbard Observation of O+ 4P-4D0 lines in proton aurora over Svalbard

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3110807i&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 10, CiteID L10807

Physics

5

Atmospheric Composition And Structure: Airglow And Aurora, Ionosphere: Auroral Ionosphere (2704), Ionosphere: Ion Chemistry And Composition (0335), Ionosphere: Particle Precipitation

Scientific paper

Spectra of a proton aurora event show lines of O+ 4P-4D0 multiplet (4639-4696 Å) enhanced relative to the N2+1N(0,2) compared to normal electron aurora. Conjugate satellite particle measurements are used as input to electron and proton transport models, to show that p/H precipitation is the dominant source of both the O+ and N2+1N emissions. The emission cross-section of the multiplet in p collisions with O and O2 estimated from published work does not explain the observed O+ brightness, suggesting a higher emission cross-section for low energy p impact on O.

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