PMO OpenIR  > 太阳活动的多波段观测研究团组
Spiral filaments - The signature of singular points in a large delta spot
Hu, FM ; Song, MT ; Liu, QZ ; Ji, HS
1996
Source PublicationSOLAR PHYSICS
ISSN0038-0938
Volume165Issue:2Pages:395—397
AbstractA large delta spot (active region NOAA 6891, October 23-November 4, 1991) is analysed, and it is found that some spiral filaments across the spot can be regarded as signatures of a singular point entity (SPE) which lies near a separator of this complicated magnetic field region. Near such an entity, 86% of the flares in the region were produced, including two white-light flares, one of which, being the largest flare of the region, was accompanied by a powerful mass ejection. In an island delta spot, a SPE could be recognized very close to the usual U-shaped inversion lines. Together with the other characteristics (bright H alpha emission, highly sheared magnetic field, umbra obscured by H alpha, magnetic flux imbalance in the range 2:1-3:1), the SPE can help us to predict effectively the sites for great flares to occur (Zirin and Liggett, 1987).
Subject AreaAstronomy & Astrophysics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8439
Collection太阳活动的多波段观测研究团组
Recommended Citation
GB/T 7714
Hu, FM,Song, MT,Liu, QZ,et al. Spiral filaments - The signature of singular points in a large delta spot[J]. SOLAR PHYSICS,1996,165(2):395—397.
APA Hu, FM,Song, MT,Liu, QZ,&Ji, HS.(1996).Spiral filaments - The signature of singular points in a large delta spot.SOLAR PHYSICS,165(2),395—397.
MLA Hu, FM,et al."Spiral filaments - The signature of singular points in a large delta spot".SOLAR PHYSICS 165.2(1996):395—397.
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