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Observational Evidence of Magnetic Reconnection Associated with Magnetic Flux Cancellation

文献类型：期刊论文

作者Yang, Bo1,2,3; Yang, Jiayan1,2; Bi, Yi1,2; Hong, Junchao1,2; Li, Haidong1,2; Xu, Zhe1,2,4; Chen, Hechao1,2,4
刊名ASTROPHYSICAL JOURNAL
出版日期2018-07-10
卷号861期号:2页码:8
关键词Sun: activity Sun: atmosphere Sun: magnetic fields
ISSN号0004-637X
DOI10.3847/1538-4357/aac37f
英文摘要Using high spatial and temporal data from the Solar Dynamics Observatory (SDO) and the Interface Region Imaging Spectrograph (IRIS), several observational signatures of magnetic reconnection in the course of magnetic flux cancellation are presented, including two loop-loop interaction processes, multiple plasma blob ejections, and a sheet-like structure that appeared above the flux cancellation sites with a Y-shaped and an inverted Y-shaped end. The IRIS. 1400 A observations show that the plasma blobs were ejected from the tip of the Y-shaped ends of the sheet-like structure. Obvious photospheric magnetic flux cancellation occurred after the first loop-loop interaction and continued until the end of the observation. Complemented by the nonlinear force-free field extrapolation, we found that two sets of magnetic field lines, which revealed an X-shaped configuration, aligned well with the interacted coronal loops. Moreover, a magnetic null point was found to be situated at about 0.9 Mm height, which was right above the flux cancellation sites and located between the two sets of magnetic field lines. These results suggest that the flux cancellation might be a result of the submergence of magnetic field lines following a magnetic reconnection that occurs in the lower atmosphere of the Sun, and the ejected plasma blobs should be plasmoids created in the sheet-like structure due to the tearing-mode instability. This observation reveals a detailed magnetic field structure and a dynamic process above the flux cancellation sites and will help us to understand magnetic reconnection in the lower atmosphere of the Sun.
WOS关键词CORONAL MASS EJECTIONS ; SOLAR-FLARE ; CURRENT SHEET ; PLASMOID EJECTIONS ; ACTIVE-REGION ; QUIET SUN ; FIELD ; LOOP ; ERUPTION ; SITES
资助项目Natural Science Foundation of China[11703084] ; Natural Science Foundation of China[11633008] ; Natural Science Foundation of China[11333007] ; Natural Science Foundation of China[11503081] ; Natural Science Foundation of China[11503082] ; CAS "Light of West China" Program ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences[KLSA201809] ; CAS[QYZDJ-SSW-SLH012] ; Project of the Group for Innovation of Yunnan Province
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000438684300015
出版者IOP PUBLISHING LTD
资助机构Natural Science Foundation of China ; Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; CAS ; CAS ; Project of the Group for Innovation of Yunnan Province ; Project of the Group for Innovation of Yunnan Province ; Natural Science Foundation of China ; Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; CAS ; CAS ; Project of the Group for Innovation of Yunnan Province ; Project of the Group for Innovation of Yunnan Province ; Natural Science Foundation of China ; Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; CAS ; CAS ; Project of the Group for Innovation of Yunnan Province ; Project of the Group for Innovation of Yunnan Province ; Natural Science Foundation of China ; Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; Open Research Program of the Key Laboratory of Solar Activity of Chinese Academy of Sciences ; CAS ; CAS ; Project of the Group for Innovation of Yunnan Province ; Project of the Group for Innovation of Yunnan Province
源URL[http://ir.bao.ac.cn/handle/114a11/21017]  
专题中国科学院国家天文台
通讯作者Yang, Bo
作者单位1.Chinese Acad Sci, Yunnan Observ, 396 Yangfangwang, Kunming 650216, Yunnan, Peoples R China
2.Chinese Acad Sci, Ctr Astron Mega Sci, 20A Datun Rd, Beijing 100012, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China
4.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Yang, Bo,Yang, Jiayan,Bi, Yi,et al. Observational Evidence of Magnetic Reconnection Associated with Magnetic Flux Cancellation[J]. ASTROPHYSICAL JOURNAL,2018,861(2):8.
APA Yang, Bo.,Yang, Jiayan.,Bi, Yi.,Hong, Junchao.,Li, Haidong.,...&Chen, Hechao.(2018).Observational Evidence of Magnetic Reconnection Associated with Magnetic Flux Cancellation.ASTROPHYSICAL JOURNAL,861(2),8.
MLA Yang, Bo,et al."Observational Evidence of Magnetic Reconnection Associated with Magnetic Flux Cancellation".ASTROPHYSICAL JOURNAL 861.2(2018):8.

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来源：国家天文台

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