Three quiescent prominences were observed in the Ca ~I K-line and a fourth one also in the H-line at Oslo Solar Observatory, Harestua, and reduced by Rustad (1974) and by Engvold et al. (1980). These data are used to study the distribution of the line-of-sight velocity component, N(uo). It is pointe
The orientation of magnetic fields in quiescent prominences
โ Scribed by E. Tandberg-Hanssen; Ulrich Anzer
- Publisher
- Springer
- Year
- 1970
- Tongue
- English
- Weight
- 322 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0038-0938
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โฆ Synopsis
We have measured the longitudinal component, Bll, of the magnetic field in quiescent prominences and obtained a relationship between BII and 0, where 0 is the angle between the long axis of the prominence and the north-s0uth direction on the sun. From this relationship we deduce a distribution function for the magnetic field vector in quiescent prominences in terms of the angle c~ between the field and the long axis of the prominence. The mean angle, &, for our data is small, ~ 15 ~ indicating that the magnetic field traverses quiescent prominences under a small, but finite angle.
๐ SIMILAR VOLUMES
The development of magnetic field structures which can lead to prominence configurations of the Kuperus-Raadu type is discussed. Starting from streamer type configurations and preserving the total current in the system we find that simple two-dimensional static configurations lead to prominences whi
On the basis of Kippenhahn and Schltiter's magnetohydrostatic model of a quiescent prominence we have attempted to study the effect of a rotational velocity field in it. We find that a physically plausible solution is not possible in the vertical plane. A possibility, however, is shown in the horizo