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题名: A magnetic bald-patch flare in solar active region 11117
作者: Jiang, Chao-Wei; Feng, Xue-Shang; Wu, Shi-Tsan; Hu, Qiang
作者部门: 空间科学部
通讯作者: Jiang, CW (reprint author), Harbin Inst Technol, Inst Space Sci & Appl Technol, Shenzhen 518055, Peoples R China. ; Jiang, CW (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, SIGMA Weather Grp, Beijing 100190, Peoples R China.
关键词: Sun: flares ; Sun: corona ; magnetic fields ; magnetohydrodynamics (MHD) ; methods: numerical
刊名: RESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN号: 1674-4527
出版日期: 2017
卷号: 17, 期号:9
收录类别: SCI
项目资助者: National Natural Science Foundation of China [41531073, 41374176, 41574170, 41231068, 41574171] ; Specialized Research Fund for State Key Laboratories
英文摘要: With SDO observations and a data-constrained magnetohydrodynamics (MHD) model, we identify a confined multi-ribbon flare that occurred on 2010 October 25 in solar active region 11117 as a magnetic bald patch (BP) flare with strong evidence. From the photospheric magnetic field observed by SDO/HMI, we find there are indeed magnetic BPs on the polarity inversion lines (PILs) which match parts of the flare ribbons. From the 3D coronal magnetic field derived from an MHD relaxation model constrained by the vector magnetograms, we find strikingly good agreement of the BP separatrix surface (BPSS) footpointswith the flare ribbons, and the BPSS itself with the hot flaring loop system. Moreover, the triggering of the BP flare can be attributed to a small flux emergence under the lobe of the BPSS, and the relevant change of coronal magnetic field through the flare is reproduced well by the pre-flare and post-flare MHD solutions, which match the corresponding pre-and post-flare AIA observations, respectively. Our work contributes to the study of non-typical flares that constitute the majority of solar flares but which cannot be explained by the standard flare model.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/6064
Appears in Collections:空间科学部_期刊论文

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