OI 630.0‐nm and N2 1PG Emissions in Pulsating Aurora Events Observed by an Optical Spectrograph at Tromsø, Norway

We performed observations of pulsating aurora (PsA) with an optical spectrograph at Tromsø, Norway, during wintertime in 2016–2017. The data analysis of multiple PsA events revealed the PsA spectra for the first time. As the results, the OI 630.0‐nm emissions and the N2 1PG emissions were found in t...

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Bibliographic Details
Published in:Journal of geophysical research. Space physics 2020-12, Vol.125 (12), p.n/a
Main Authors: Tsuda, T. T., Li, C., Hamada, S., Hosokawa, K., Oyama, S.‐i., Nozawa, S., Kawabata, T., Mizuno, A., Kurihara, J., Nishiyama, T., Kosch, M. J.
Format: Article
Language:English
Subjects:
Auroras
Data analysis
Emissions
optical spectrograph
pulsating aurora
Spectra
Tromsø
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Summary:We performed observations of pulsating aurora (PsA) with an optical spectrograph at Tromsø, Norway, during wintertime in 2016–2017. The data analysis of multiple PsA events revealed the PsA spectra for the first time. As the results, the OI 630.0‐nm emissions and the N2 1PG emissions were found in the both spectra during brighter (ON) and darker (OFF) phases in the PsA events. The spectra of pulsations were derived as difference spectra between the ON and OFF spectra. From the obtained spectra of pulsations, it is found that dominant pulsations at 630.0 nm were coming from the N2 1PG (10,7) band, and there were less or minor contributions of the OI 630.0 nm to pulsations at 630.0 nm. Key Points Pulsating aurora events were observed by an optical spectrograph ON and OFF spectra showed OI 630.0‐nm and N2 1PG emissions Dominant pulsations around 630.0 nm were due to N2 1PG (10,7) emissions
ISSN:2169-9380
2169-9402
DOI:10.1029/2020JA028250