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Observation of a coronal hole at 85 GHz

✍ Scribed by M. R. Kundu; Sou-Yang Liu

Publisher
Springer
Year
1976
Tongue
English
Weight
253 KB
Volume
49
Category
Article
ISSN
0038-0938

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✦ Synopsis

A coronal hole was observed at 85 GHz(3.5 mm-h) on November 24, 1970, when a spectacular coronal hole was observed in soft X-rays by AS&E. The miUimeter counterpart of the hole is much weaker and less widespread than in X-rays. The brightness temperature inside the hole was in most places about 100-200 K lower than the mean brightness temperature of the Sun at 85 GHz.

πŸ“œ SIMILAR VOLUMES

A coronal hole observed at 10.7 GHz with
A coronal hole observed at 10.7 GHz with a large single dish
✍ E. FΓΌrst; W. Hirth πŸ“‚ Article πŸ“… 1975 πŸ› Springer 🌐 English βš– 214 KB

On July 24, 1973, a coronal hole was observed at 10.69 GHz (2.8 cm) with the Bonn 100-m telescope. The difference of the brightness temperature between outside and inside the hole was about 400 to 500 K. It is shown that this lack of emission can be explained by usually adopted values of the electro