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

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...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Ivchenko, N., Galand, M., Rees, M.H., Lanchester, B.S., Lummerzheim, D.
Format: Article in Journal/Newspaper
Language:unknown
Published: 2004
Subjects:
Svalbard
Online Access:https://eprints.soton.ac.uk/9125/
http://www.agu.org/journals/gl/gl0410/2003GL019313/index.html
Description
Summary: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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