University of Oulu

Tsuda, T. T., Li, C., Hamada, S., Hosokawa, K., Oyama, S.‐i., Nozawa, S., et al. (2020). OI 630.0‐nm and N2 1PG emissions in pulsating aurora events observed by an optical spectrograph at Tromsø, Norway. Journal of Geophysical Research: Space Physics, 125, e2020JA028250. https://doi.org/10.1029/2020JA028250

OI 630.0‐nm and N₂ 1PG emissions in pulsating aurora events observed by an optical spectrograph at Tromsø, Norway

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Author: Tsuda, T. T.1; Li, C.1; Hamada, S.1;
Organizations: 1Department of Computer and Network Engineering, University of Electro-Communications (UEC), Chofu, Japan
2Institute for Space-Earth Environmental Research (ISEE), Nagoya University, Nagoya, Japan
3National Institute of Polar Research (NIPR), Tachikawa, Japan
4Space Physics and Astronomy Research Unit, University of Oulu, Oulu, Finland
5Department of Earth and Planetary Sciences, Hokkaido University, Sapporo, Japan
6Department of Polar Science, The Graduate University for Advanced Studies, SOKENDAI, Tachikawa, Japan
7South African National Space Agency (SANSA), Hermanus, South Africa
8Department of Physics, Lancaster University, Lancaster, UK
9Department of Physics and Astronomy, University of theWestern Cape, Bellville, South Africa
Format: article
Version: published version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe202102043711
Language: English
Published: American Geophysical Union, 2020
Publish Date: 2021-05-13
Description:

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.

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Series: Journal of geophysical research. Space physics
ISSN: 2169-9380
ISSN-E: 2169-9402
ISSN-L: 2169-9380
Volume: 125
Issue: 12
Article number: e2020JA028250
DOI: 10.1029/2020JA028250
OADOI: https://oadoi.org/10.1029/2020JA028250
Type of Publication: A1 Journal article – refereed
Field of Science: 115 Astronomy and space science
Subjects:
Funding: This work was supported in part by MEXT/JSPS KAKENHI (grants JP15H05747, JP15H05815, JP16H01171, JP16H06021, JP16H06286, JP17H02968, JP19H01956, JP20K20940, and JPJSBP120194814), by the Sumitomo Foundation Basic Science Research (grant 150627), by Inamori Research Grants from Inamori Foundation, by Research Grants from JGC‐S Scholarship Foundation, by Research Grants from Casio Science Promotion Foundation, by National Institute of Polar Research (NIPR) through General Collaboration Project, 31‐3, and by the joint research program of the Institute for Space‐Earth Environmental Research (ISEE), Nagoya University.
Dataset Reference: The spectrograph data can be available on request to T. T. Tsuda (takuo.tsuda@uec.ac.jp) or can be available directly at the website for the spectrograph (http://ttt01.cei.uec.ac.jp/sg01/). The sensitivity calibrations for the spectrograph were done by using the integrated sphere light source at National Institute of Polar Research (NIPR), Tachikawa, Tokyo, Japan. The infrastructure for the spectrograph is supplied by Tromsø Geophysical Observatory (TGO), The Arctic University of Norway (UiT). The OMNI data, shown in Supporting Information S1, were obtained by using Space Physics Environment Data Analysis Software (SPEDAS) (http://spedas.org/) with a plug‐in software developed by Inter‐university Upper atmosphere Global Observation NETwork (IUGONET) (http://www.iugonet.org/).
  http://ttt01.cei.uec.ac.jp/sg01/
http://spedas.org/
http://www.iugonet.org/
Copyright information: ©2020. American Geophysical Union. All Rights Reserved.