OBSERVATIONAL EVIDENCE OF THE KINK INSTABILITY IN SOLAR
OBSERVATIONAL EVIDENCE OF THE KINK INSTABILITY IN SOLAR FILAMENT ERUPTIONS AND SIGMOIDS D. M. Rust and B. J. La. Bonte 2005, Ap. J, 622, L 69 2005年 6月6日 太陽雑誌会(速報) Eruption filament のtwist と writhe の向きを調べたり、シグモイドの形を調べ たりしてキンクの起こりうる徴候を調べた。
It is only necessary to examine the image sequences and use the instances When dark, absorbing material obscures a bright thread or knot to determine the sense of twist and writhe. Using TRACE images in this manner, Chae (2000) determined the chirality of an active filament, and Rust (2003) determined the sense of writhe in the 2002 May 27 event. The present Letter is the first to use the technique systematically to determine both the sense of twist and the sense of writhe in active filaments. 2000 -Jul-19 Both twist and writhe are positive
Rust & Kumar (1996) L/W~5. 4 Automatic sigmoid identification code (La. Bonte et al. 2003) (集録) SXT, Goes SXI, EIT を使った。 自動検出プログラムでシグモイドを検出。 Automatically classifying solar filaments (Bernasconi & Rust 2004) (集録) L/W ~ 5. 47 で Rust & Kumar (1996) の estimation によく一致した
We found that, in each case, the sign of the writhe matched the sign of the internal twist, as inferred from the patterns of bright and dark threads.
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