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Title:
Helical flux ropes in solar prominences
Authors:
Martens, P. C. H.; van Ballegooijen, A. A.
Affiliation:
AA(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA), AB(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA)
Publication:
IN: Physics of magnetic flux ropes (A92-31201 12-75). Washington, DC, American Geophysical Union, 1990, p. 337-342.
Publication Date:
00/1990
Category:
Solar Physics
Origin:
STI
NASA/STI Keywords:
MAGNETIC FIELD CONFIGURATIONS, MAGNETIC FLUX, SOLAR MAGNETIC FIELD, SOLAR PROMINENCES, DYNAMO THEORY, FORCE-FREE MAGNETIC FIELDS, SHEAR LAYERS, SOLAR PHYSICS
Bibliographic Code:
1990GMS....58..337M

Abstract

The 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.
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Database: Astronomy
Physics
arXiv e-prints