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Flare Ribbons Approach Observed by the Interface Region Imaging Spectrograph and the Solar Dynamics Observatory

文献类型：期刊论文

作者Hou, Yijun1,2; Li, Ting1,2; Zhang, Jun1,2; Li,Ting; Zhang,Jun
刊名ASTROPHYSICAL JOURNAL
出版日期2017-10-10
卷号848期号:1
关键词Sun: Activity Sun: Flares Sun: Transition Region Sun: Uv Radiation
DOI10.3847/1538-4357/aa8c01
文献子类Article
英文摘要We report flare ribbons approach (FRA) during a multiple-ribbon M-class flare on 2015 November 4 in NOAA AR 12443, obtained by the Interface Region Imaging Spectrograph and the Solar Dynamics Observatory. The flare consisted of a pair of main ribbons and two pairs of secondary ribbons. The two pairs of secondary ribbons were formed later than the appearance of the main ribbons, with respective time delays of 15 and 19 minutes. The negative-polarity main ribbon spread outward faster than the first secondary ribbon with the same polarity in front of it, and thus the FRA was generated. Just before their encounter, the main ribbon was darkening drastically and its intensity decreased by about 70% in 2 minutes, implying the suppression of main-phase reconnection that produced two main ribbons. The FRA caused the deflection of the main ribbon to the direction of secondary ribbon with a deflection angle of about 60 degrees. A post-approach arcade was formed about 2 minutes later and the downflows were detected along the new arcade with velocities of 35-40 km s(-1), indicative of the magnetic restructuring during the process of FRA. We suggest that there are three topological domains with footpoints outlined by the three pairs of ribbons. Close proximity of these domains leads to deflection of the ribbons, which is in agreement with the magnetic field topology.
WOS关键词MAGNETIC RECONNECTION ; 2-RIBBON FLARES ; NULL POINTS ; PROPAGATION ; MODELS ; EVENT ; SDO
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000412575600012
资助机构Norwegian Space Center (NSC, Norway) through ESA PRODEX contract ; Norwegian Space Center (NSC, Norway) through ESA PRODEX contract ; National Natural Science Foundations of China(11773039 ; National Natural Science Foundations of China(11773039 ; Youth Innovation Promotion Association of CAS(2017078) ; Youth Innovation Promotion Association of CAS(2017078) ; 11533008 ; 11533008 ; 11673035 ; 11673035 ; 11673034) ; 11673034) ; Norwegian Space Center (NSC, Norway) through ESA PRODEX contract ; Norwegian Space Center (NSC, Norway) through ESA PRODEX contract ; National Natural Science Foundations of China(11773039 ; National Natural Science Foundations of China(11773039 ; Youth Innovation Promotion Association of CAS(2017078) ; Youth Innovation Promotion Association of CAS(2017078) ; 11533008 ; 11533008 ; 11673035 ; 11673035 ; 11673034) ; 11673034)
源URL[http://ir.bao.ac.cn/handle/114a11/20194]  
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, Key Lab Solar Act, Beijing 100012, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Hou, Yijun,Li, Ting,Zhang, Jun,et al. Flare Ribbons Approach Observed by the Interface Region Imaging Spectrograph and the Solar Dynamics Observatory[J]. ASTROPHYSICAL JOURNAL,2017,848(1).
APA Hou, Yijun,Li, Ting,Zhang, Jun,Li,Ting,&Zhang,Jun.(2017).Flare Ribbons Approach Observed by the Interface Region Imaging Spectrograph and the Solar Dynamics Observatory.ASTROPHYSICAL JOURNAL,848(1).
MLA Hou, Yijun,et al."Flare Ribbons Approach Observed by the Interface Region Imaging Spectrograph and the Solar Dynamics Observatory".ASTROPHYSICAL JOURNAL 848.1(2017).

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来源：国家天文台

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