Differential rotation and reconnection as basic causes of some coronal reorientations
✍ Scribed by Shirley F. Hansen; Richard T. Hansen
- Publisher
- Springer
- Year
- 1975
- Tongue
- English
- Weight
- 395 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0038-0938
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✦ Synopsis
A process is suggested by which a coronal structure (with underlying filament) may form between a polar crown structure and a low-latitude bipolar region. During the ascending phase of the solar cycle the identifying underlying filament should lie poleward and westward of the active region, but during the descending phase it should appear as an eastward extension of the filament separating leader and follower photospheric fields within the active region.
The purpose of this paper is to point out that because of differential rotation, photospheric magnetic regions which originate at widely separated longitudes will ultimately be drawn into proximity and that with their 'merger', major reorientations of magnetic fields in the solar atmosphere may result. We describe a process by which this may occur, consistent with observed patterns of chromospheric and coronal observations, and differing somewhat for the ascending and descending phases of the solar cycle.