Helical flux ropes in solar prominencesThe present numerical method for the computation of force-free, cancelling magnetic structures shows that flux cancellation at the neutral line in a sheared magnetic arcade generates helical field lines that can support a prominence's plasma. With increasing flux cancellation, the axis of the helical fields moves to greater heights; this is suggestive of a prominence eruption. Two alternative scenarios are proposed for the formation of polar crown prominences which yield the correct axial magnetic field sign. Both models are noted to retain the formation of helical flux tubes through flux cancellation as their key feature.
Document ID
19920048622
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Martens, P. C. H. (NASA Headquarters Washington, DC United States)
Van Ballegooijen, A. A. (Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)