fl244.zhang_heng01 Posted: 16-Dec-96 Updated: Events specified: see text
proposers: H. Zhang (Yunnan Observatory, CAS)
T. Sakurai (NAOJ)
A. A. Xu (Nanjing University, China)
Y. Suematsu (NAOJ)
abstract
We often observe a helical structure of threads in filaments. This indicates the existence of an electric current system in filaments. The intensity of the electric currents will change when the magnetic fields in or around the filaments change. For example, when a filament rises from the chromosphere, it is expected that the current density might increase and a Joule-mode instability may be induced. The interruption of the currents may trigger flares.
The proposed research looks into the process of filament current evolution by using the X-ray data of Yohkoh together with ground-based magnetic field data, and discuss the validity of the model that the interruption of electric currents leads flares.
events to be studied: May 19 (AR7172), Jun 4 (AR7186), and July 8 (AR7220), 1992