Physics
Scientific paper
Sep 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982acasn..23..203c&link_type=abstract
Acta Astronomica Sinica, vol. 23, Sept. 1982, p. 203-210. In Chinese, with abstract in English.
Physics
1
Chromosphere, Solar Atmosphere, Solar Flares, Solar Magnetic Field, Solar Prominences, Taylor Instability, Current Sheets, Magnetic Flux, Neutral Sheets, Solar Physics
Scientific paper
The energy storage for a spotless two ribbon flare is discussed from the viewpoint of the morphology of chromospheric fibrils in the environment of a filament prior to the flare. Also, on the basis of the Kippenhahn-Schluter model of filaments (1957), the instability of magnetic structure in these filaments is discussed. It is found that once the gradient of magnetic field in the filament and the curvature of dip on the top of its convex magnetic arches exceed certain thresholds, the Rayleigh-Tayler instability will be triggered in the filament, leading to a sudden disappearance of the filament. At the same time, it is suggested that as soon as the instability occurs, a neutral current sheet in the magnetic field supporting the filament will be formed with concentration of the magnetic flux on both sides of the filament. Rapid reconnection of the magnetic lines may lead to the onset of two ribbon flares.
Cao Tian-Jun
Cheng Chung-Chieh
Xu Aiguo
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