HR: 1330h
AN: SP23A-08    [Abstracts]
TI: CME Onset Due to Loss of Confinement of Twisted Magnetic Flux Ropes
AU: * Fan, Y
EM: yfan@ucar.edu
AF: HAO, National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301 United States
AU: Gibson, S
EM: sginson@ucar.edu
AF: HAO, National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301 United States
AB: We present MHD simulations in both 2D axisymmetric and 3D spherical geometries of the evolution of a twisted magnetic flux rope emerging into the low-β corona previously occupied by a potential arcade field. We describe both the initial quasi-static evolution whereby stable equilibrium structures can form with stored free magnetic energy, and the eventual loss of confinement or equilibrium of the twisted magnetic flux rope as sufficient twist is being transported into the corona, resulting in the onset of a CME. We investigate how the evolution and the loss of equilibrium for a 3D line-tied flux rope differ compared to the case of a 2D axisymmetric flux rope.
DE: 7509 Corona
DE: 7513 Coronal mass ejections
DE: 7524 Magnetic fields
DE: 7531 Prominence eruptions
SC: Solar Physics Division - AAS [SP]
MN: 2005 Joint Assembly