DOI: 10.1002/2017JA024710
Scopus记录号: 2-s2.0-85043373607
论文题名: Statistical Study of Magnetic Topology for Eruptive and Confined Solar Flares
作者: Cui Y. ; Wang H. ; Xu Y. ; Liu S.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 3 起始页码: 1704
结束页码: 1714
语种: 英语
英文关键词: Confined flares
; Eruptive flares
; Magnetic topology
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° 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. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114365
Appears in Collections: 气候减缓与适应
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作者单位: National Space Science Center, Chinese Academy of Sciences, Beijing, China; Space Weather Research Lab, Center for Solar-Terrestrial Research, New Jersey Institute of Technology, Newark, NJ, United States; Big Bear Solar Observatory, Big Bear City, CA, United States; University of Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Cui Y.,Wang H.,Xu Y.,et al. Statistical Study of Magnetic Topology for Eruptive and Confined Solar Flares[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(3)