Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996pasj...48..545i&link_type=abstract
Publications of the Astronomical Society of Japan, v.48, p.545-554.
Astronomy and Astrophysics
Astronomy
12
Sun: Corona, Sun: Eclipse, Sun: Solar Wind
Scientific paper
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 Angstroms and 4300 Angstroms 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 RO and 2.0 RO by ~ 80 km s(-1) was found in the streamer.
Ichimoto Kiyoshi
Kobiki Toshihiko
Kumagai Kazuyoshi
Munoz Alberto
Sano Issei
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