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题名: Statistical Study of Magnetic Topology for Eruptive and Confined Solar Flares
作者: Cui, Yanmei; Wang, Haimin; Xu, Yan; Liu, Siqing
作者部门: 空间环境部
通讯作者: Cui, YM (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, Beijing, Peoples R China. ; Cui, YM (reprint author), New Jersey Inst Technol, Space Weather Res Lab, Ctr Solar Terr Res, Newark, NJ 07102 USA.
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
ISSN号: 2169-9380
出版日期: 2018
卷号: 123, 期号:3, 页码:1704-1714
收录类别: SCI
项目资助者: National Natural Science Foundation of China [41604149] ; U.S. NSF [AGS-1408703, AGS-1539791, AGS-1620875]
英文摘要: Large flares and halo coronal mass ejections (CMEs) can often cause strong space environment disturbances and sequently a series of space environment effects. The X-class flares associated with halo CMEs are particular prone to these effects. In this paper, 58 X-class flares were collected and studied with the source locations in 30 degrees from the disk center, which were observed from 1996 to 2015. Among these events, 48 flares were associated with CMEs and defined as "eruptive" events. The other 10 flares without CMEs were defined as "confined" flares. By comparing the properties of flares and associated magnetic fields for the two sets of samples, we found the following: (1) magnetic free energy and overlying transverse fields play important roles in producing solar eruptions. Eruptive flares with high-speed CMEs tend to occur in active regions with more free energy and larger decay index. (2) CME speeds are affected by magnetic free energy, which are described by parameters of the unsigned magnetic flux, the area of polarity inversion region, and the strength of transverse fields in the low altitude. These parameters have moderate positive correlations with CME speeds.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/6309
Appears in Collections:空间环境部_期刊论文

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