A Holistic Modeling of the Transition Process from
Pre-Flare Sigmoid to Flare Eruption
K.Kusano, S.Inoue, D.Shiota, T.Yamamoto, T.Yokoyama, and T.Sakurai
Although the satellite observations for the last decade strongly support the
reconnection scenario for the energy liberation mechanism of solar flares,
the transition process from pre-flare to the onset of flare is not yet well
understood. The realization of the three-dimensional (3D) structure of
magnetic field in pre-flare phase is believed to be able to shed light upon
this long-standing problem. The combination of the high-precision vector
magnetograms provided by Solar-B/SOT and the large scale numerical
simulation using high-speed super computers must be a powerful tool for this
purpose. In this paper, first, we present the recent results of our 3D
simulations, which indicate that the causal process from the formation of
pre-flare sigmoid to the onset of flare eruption can be explained as a
consequence of the tearing mode instability growing on thin current sheet,
where magnetic shear is steeply reversed. Second, we discuss the prospect
and the problem in the 3D numerical modeling to reconstruct the structure
and the dynamics of active regions using the Solar-B data and the
state-of-the-art numerical technique.
Correspondence
Kanya Kusano (kusano@jamstec.go.jp), The Earth Simulator Center, JAMSTEC
presentation
oral