Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsh23b1543c&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #SH23B-1543
Astronomy and Astrophysics
Astrophysics
[7509] Solar Physics, Astrophysics, And Astronomy / Corona, [7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections, [7524] Solar Physics, Astrophysics, And Astronomy / Magnetic Fields, [7526] Solar Physics, Astrophysics, And Astronomy / Magnetic Reconnection
Scientific paper
The evolutions of an isolated single flux rope and multiple flux rope systems under twisting motions have been studied using three-dimensional resistive magnetohydrodynamic (MHD) simulations. All systems under investigation are found to show an eruptive behavior beyond a certain amount of twist. When the plasma beta is low in the overall atmosphere, the expansion of the flux ropes is rather free and a quasi-static evolutionary period lasts quite long before an eruption is initiated. When the plasma beta in the upper corona is rather high, the expansion of the system is more or less impeded and an eruptive behavior shows up very abruptly with a smaller twist than required by the eruption in the overall low beta plasma. This suggests that an initial confinement of a flux system rather promotes a more catastrophic evolution eventually.
Choe G.
Jun He
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