Measurement of the Coronal Electron Temperature at the Total Solar Eclipse on 1994 November 3
A spectroscopic observation was carried out at the total solar eclipse on 1994 November 3 in Putre, Chile, in order to investigate the electron temperature and the expanding motion of the corona. The shape of weak depressions at 3900 Å and 4300 Å in the continuous coronal spectra was compared with t...
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Oxford University Press (OUP)
1996
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Online Access: | http://dx.doi.org/10.1093/pasj/48.3.545 https://academic.oup.com/pasj/article-pdf/48/3/545/9713537/pasj48-0545.pdf |
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croxfordunivpr:10.1093/pasj/48.3.545 2024-10-06T13:52:51+00:00 Measurement of the Coronal Electron Temperature at the Total Solar Eclipse on 1994 November 3 Ichimoto, Kiyoshi Kumagai, Kazuyoshi Sano, Issei Kobiki, Toshihiko Sakurai, Takashi Muñoz, Alberto 1996 http://dx.doi.org/10.1093/pasj/48.3.545 https://academic.oup.com/pasj/article-pdf/48/3/545/9713537/pasj48-0545.pdf en eng Oxford University Press (OUP) Publications of the Astronomical Society of Japan volume 48, issue 3, page 545-554 ISSN 0004-6264 2053-051X journal-article 1996 croxfordunivpr https://doi.org/10.1093/pasj/48.3.545 2024-09-17T04:29:55Z A spectroscopic observation was carried out at the total solar eclipse on 1994 November 3 in Putre, Chile, in order to investigate the electron temperature and the expanding motion of the corona. The shape of weak depressions at 3900 Å and 4300 Å in the continuous coronal spectra was compared with the theoretical electron-scattered coronal spectra; thus, the magnitude of the electron thermal motion was determined directly. It was found that a coronal streamer on the eastern limb and a coronal hole on the south-pole have overall temperatures of about 1.5–1.7 MK and 0.9–1.1 MK, respectively. No significant height variation in the temperature was found in the streamer, while the coronal hole shows evidence of increasing temperature with height. An acceleration of the expanding motion between 1.1 R⊙ and 2.0 R⊙ by ∼ 80 km s−1 was found in the streamer. Article in Journal/Newspaper South pole Oxford University Press South Pole Publications of the Astronomical Society of Japan 48 3 545 554 |
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Open Polar |
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Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
description |
A spectroscopic observation was carried out at the total solar eclipse on 1994 November 3 in Putre, Chile, in order to investigate the electron temperature and the expanding motion of the corona. The shape of weak depressions at 3900 Å and 4300 Å in the continuous coronal spectra was compared with the theoretical electron-scattered coronal spectra; thus, the magnitude of the electron thermal motion was determined directly. It was found that a coronal streamer on the eastern limb and a coronal hole on the south-pole have overall temperatures of about 1.5–1.7 MK and 0.9–1.1 MK, respectively. No significant height variation in the temperature was found in the streamer, while the coronal hole shows evidence of increasing temperature with height. An acceleration of the expanding motion between 1.1 R⊙ and 2.0 R⊙ by ∼ 80 km s−1 was found in the streamer. |
format |
Article in Journal/Newspaper |
author |
Ichimoto, Kiyoshi Kumagai, Kazuyoshi Sano, Issei Kobiki, Toshihiko Sakurai, Takashi Muñoz, Alberto |
spellingShingle |
Ichimoto, Kiyoshi Kumagai, Kazuyoshi Sano, Issei Kobiki, Toshihiko Sakurai, Takashi Muñoz, Alberto Measurement of the Coronal Electron Temperature at the Total Solar Eclipse on 1994 November 3 |
author_facet |
Ichimoto, Kiyoshi Kumagai, Kazuyoshi Sano, Issei Kobiki, Toshihiko Sakurai, Takashi Muñoz, Alberto |
author_sort |
Ichimoto, Kiyoshi |
title |
Measurement of the Coronal Electron Temperature at the Total Solar Eclipse on 1994 November 3 |
title_short |
Measurement of the Coronal Electron Temperature at the Total Solar Eclipse on 1994 November 3 |
title_full |
Measurement of the Coronal Electron Temperature at the Total Solar Eclipse on 1994 November 3 |
title_fullStr |
Measurement of the Coronal Electron Temperature at the Total Solar Eclipse on 1994 November 3 |
title_full_unstemmed |
Measurement of the Coronal Electron Temperature at the Total Solar Eclipse on 1994 November 3 |
title_sort |
measurement of the coronal electron temperature at the total solar eclipse on 1994 november 3 |
publisher |
Oxford University Press (OUP) |
publishDate |
1996 |
url |
http://dx.doi.org/10.1093/pasj/48.3.545 https://academic.oup.com/pasj/article-pdf/48/3/545/9713537/pasj48-0545.pdf |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
Publications of the Astronomical Society of Japan volume 48, issue 3, page 545-554 ISSN 0004-6264 2053-051X |
op_doi |
https://doi.org/10.1093/pasj/48.3.545 |
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Publications of the Astronomical Society of Japan |
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48 |
container_issue |
3 |
container_start_page |
545 |
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554 |
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1812181445425233920 |