The Si IV λ 1393 line in a coronal hole compared to the quiet Sun from OSO-8 observations
✍ Scribed by Michael H. Francis; Robert Roussel-Dupré
- Publisher
- Springer
- Year
- 1977
- Tongue
- English
- Weight
- 247 KB
- Volume
- 53
- Category
- Article
- ISSN
- 0038-0938
No coin nor oath required. For personal study only.
✦ Synopsis
We report on studies of the k 1393 line of Si ix, lormed in the transition region at about 8(I 000 K, made using the Colorado experiment on OSO-8. Results indicate that the line width is somewhat greater in coronal holes compared to the quiet Sun, implying a dilterence in the broadening mechanism. There is no evidence that the line is l)oppler shifted in coronal hole~ relative to the quiet Sun implying there is no mass flow in holes, at the 80 0(10 K level, greater than 4.3 km s ~. Within the uncertainty of our experiment the integrated line intensities are the same in a coronal hole as in the quiet Sun.