Simulation Study of Three-Dimensional and
Nonlinear Dynamics of Flux Rope in the Solar Corona
S.Inoue and K.Kusano
We numerically investigated the three-dimensional (3D)
stability and the　nonlinear dynamics of flux rope embedded
in magnetic arcade. As a results, we found that the flux
rope is unstable to the kink mode instability, as the system
approach to the loss-of-equilibrium state. The 3D simulation
shows that when the flux rope is long enough, it can escape
from the arcade with an almost constant speed after the
accelerated launching due to the kink instability. This
constant ascending is driven by magnetic reconnection on
the current sheet, which is formed above the magnetic neutral
line as a consequence of the instability. However, when the
flux rope is short enough, the current sheet can not be
maintained, so that the ascending is failed at some height.
These results imply that the nonlinear effect mainly
influenced by magnetic reconnection may determine whether the
flux rope is ejected or not.
Correspondence
Satoshi Inoue (inosato@hiroshima-u.ac.jp), Hiroshima University
presentation
poster