OI 630.0‐nm and N2 1PG Emissions in Pulsating Aurora Events Observed by an Optical Spectrograph at Tromsø, Norway. Issue 12 (1st December 2020)

• Record Type: Journal Article
• 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.
• Is Part Of: Journal of geophysical research. Volume 125:Issue 12(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-12-01
• Subjects: pulsating aurora -- optical spectrograph -- Tromsø; Magnetospheric physics -- Periodicals; Space environment -- Periodicals; Cosmic physics -- Periodicals; Planets -- Atmospheres -- Periodicals; Heliosphere (Astrophysics) -- Periodicals; Geophysics -- Periodicals; 523.01
• DOI: 10.1029/2020JA028250
• Languages: English
• ISSNs: 2169-9380

Abstract

Abstract: 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