Abstract
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.
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The National Center for Atmospheric Research is sponsored by the National Science Foundation.
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Hansen, S.F., Hansen, R.T. Differential rotation and reconnection as basic causes of some coronal reorientations. Sol Phys 44, 503–508 (1975). https://doi.org/10.1007/BF00153228
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DOI: https://doi.org/10.1007/BF00153228