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Block-induced Complex Structures Building the Flare-productive Solar Active Region 12673

文献类型：期刊论文

作者Yang, Shuhong1,4; Song, Qiao2; Zhu, Xiaoshuai3; Zhang, Jun1,4; Yang,Shuhong; Zhang,Jun
刊名ASTROPHYSICAL JOURNAL LETTERS
出版日期2017-11-10
卷号849期号:2
关键词Sun: Activity Sun: Flares Sun: Magnetic Fields Sun: Photosphere Sunspots
DOI10.3847/2041-8213/aa9476
文献子类Article
英文摘要Solar active region (AR) 12673 produced 4 X-class, 27 M-class, and numerous lower-class flares during its passage across the visible solar disk in 2017 September. Our study is to answer the questions why this AR was so flareproductive and how the X9.3 flare, the largest one of the past decade, took place. We find that there was a sunspot in the initial several days, and then two bipolar regions emerged nearby it successively. Due to the standing of the pre-existing sunspot, the movement of the bipoles was blocked, while the pre-existing sunspot maintained its quasi-circular shaped umbra only with the disappearance of a part of penumbra. Thus, the bipolar patches were significantly distorted, and the opposite polarities formed two semi-circular shaped structures. After that, two sequences of new bipolar regions emerged within the narrow semi-circular zone, and the bipolar patches separated along the curved channel. The new bipoles sheared and interacted with the previous ones, forming a complex topological system, during which numerous flares occurred. At the highly sheared region, a great deal of free energy was accumulated. On September 6, one negative patch near the polarity inversion line began to rapidly rotate and shear with the surrounding positive fields, and consequently the X9.3 flare erupted. Our results reveal that the block-induced complex structures built the flare-productive AR and the X9.3 flare was triggered by an erupting filament due to the kink instability. To better illustrate this process, a block-induced eruption model is proposed for the first time.
WOS关键词CORONAL MASS EJECTIONS ; MAGNETIC-FIELD ; EMERGING FLUX ; RECONNECTION ; CANCELLATION ; SUNSPOT ; EMERGENCE ; EVOLUTION ; ERUPTIONS ; EVENT
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000414266100003
资助机构National Natural Science Foundations of China(11673035 ; National Natural Science Foundations of China(11673035 ; Key Programs of the Chinese Academy of Sciences(QYZDJ-SSW-SLH050) ; Key Programs of the Chinese Academy of Sciences(QYZDJ-SSW-SLH050) ; Youth Innovation Promotion Association of CAS(2014043) ; Youth Innovation Promotion Association of CAS(2014043) ; 11533008 ; 11533008 ; 11403044 ; 11403044 ; 41404136 ; 41404136 ; 11373004) ; 11373004) ; National Natural Science Foundations of China(11673035 ; National Natural Science Foundations of China(11673035 ; Key Programs of the Chinese Academy of Sciences(QYZDJ-SSW-SLH050) ; Key Programs of the Chinese Academy of Sciences(QYZDJ-SSW-SLH050) ; Youth Innovation Promotion Association of CAS(2014043) ; Youth Innovation Promotion Association of CAS(2014043) ; 11533008 ; 11533008 ; 11403044 ; 11403044 ; 41404136 ; 41404136 ; 11373004) ; 11373004)
源URL[http://ir.bao.ac.cn/handle/114a11/20200]  
专题国家天文台_太阳物理研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, CAS Key Lab Solar Act, Beijing 100012, Peoples R China
2.China Meteorol Adm, Natl Ctr Space Weather, Key Lab Space Weather, Beijing 100081, Peoples R China
3.Max Planck Inst Solar Syst Res, D-37077 Gottingen, Germany
4.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Yang, Shuhong,Song, Qiao,Zhu, Xiaoshuai,et al. Block-induced Complex Structures Building the Flare-productive Solar Active Region 12673[J]. ASTROPHYSICAL JOURNAL LETTERS,2017,849(2).
APA Yang, Shuhong,Song, Qiao,Zhu, Xiaoshuai,Zhang, Jun,Yang,Shuhong,&Zhang,Jun.(2017).Block-induced Complex Structures Building the Flare-productive Solar Active Region 12673.ASTROPHYSICAL JOURNAL LETTERS,849(2).
MLA Yang, Shuhong,et al."Block-induced Complex Structures Building the Flare-productive Solar Active Region 12673".ASTROPHYSICAL JOURNAL LETTERS 849.2(2017).

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来源：国家天文台

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