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OI 630.0‐nm and N 2 1PG Emissions in Pulsating Aurora Events Observed by an Optical Spectrograph at Tromsø, Norway
Author(s) -
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.
Publication year - 2020
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
eISSN - 2169-9402
pISSN - 2169-9380
DOI - 10.1029/2020ja028250
Subject(s) - spectrograph , spectral line , physics , astrophysics , emission spectrum , optical spectra , atmospheric sciences , astronomy
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 N 2 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 N 2 1PG (10,7) band, and there were less or minor contributions of the OI 630.0 nm to pulsations at 630.0 nm.