Other
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsh21a..03i&link_type=abstract
American Geophysical Union, Fall Meeting 2003, abstract #SH21A-03
Other
7509 Corona, 7513 Coronal Mass Ejections, 7531 Prominence Eruptions, 7827 Kinetic And Mhd Theory
Scientific paper
We consider the 3D force-free flux rope configuration which was proposed by Titov and Demoulin [Astron. Astrophys., 351, 707, 1999] as an approximation to the observed topology of coronal structures leading to eruptive flares. This configuration consists of a toroidal flux rope, oriented vertically, which intersects the photospheric surface at some distance above the center of the torus, along with several other photospheric sources which make up the potential background field in the corona. We extend the analysis of this configuration to correctly implement the effects of photospheric line-tying. We then investigate the equilibrium properties of this configuration and the conditions which yield an ideal loss of equilibrium. We follow the subsequent eruption of the flux rope under the assumption that the coronal portion retains a circular arc structure. Ultimately, this model will provide a semi-analytic 3D description of the evolution of coronal magnetic structures during an eruptive flare.
Forbes Terry G.
Isenberg Philip A.
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