中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Spectral and Imaging Observations of a Current Sheet Region in a Small-scale Magnetic Reconnection Event

文献类型:期刊论文

作者Xue ZK(薛志科)1,2; Yan XL(闫晓理)1,2; Yang LH(杨丽恒)1,2; Wang JC(王金成)1,2; Feng, Song3; Li QL(李巧玲)1,2,4; Ji KF(季凯帆)1,2; Zhao L(赵丽)1,2
刊名ASTROPHYSICAL JOURNAL LETTERS
出版日期2018-05-01
卷号858期号:1
ISSN号2041-8205
关键词Magnetic Reconnection Sun: Activity Sun: Magnetic Fields Sun: Transition Region
DOI10.3847/2041-8213/aabe77
产权排序第1完成单位
文献子类Article
英文摘要

We report a possible current sheet region associated with a small-scale magnetic reconnection event by using the spectral and imaging observations of the Interface Region Imaging Spectrograph (IRIS) and the magnetograms obtained by the Solar Dynamics Observatory on 2016 August 08. The length and width of the current sheet region are estimated to be from 1.4 +/- 0.1 Mm to 3.0 +/- 0.3 Mm and from 0.34 +/- 0.01 Mm to 0.64 +/- 0.09 Mm, respectively. The evolutions of the length of the current sheet region are positively correlated with that of the width. These measurements are among the smallest reported. When the IRIS slit scans the current sheet region, the spectroscopic observations show that the Si IV line is broadened in the current sheet region and the plasma has a blueshifted feature at the middle and a redshifted feature at the ends of the current sheet region. The maximum measured blueshifted and redshifted Doppler velocities are -20.8 +/- 0.9 and 34.1 +/- 0.4 km s(-1), respectively. Additionally, the electron number densities of the plasma in the current sheet region are computed to be around 10(11) cm(-3) based on the spectrums of the two O IV lines. The emergence, movement, and cancellation of a small sunspot with negative polarity are observed during the formation and shift of the current sheet region. We suggest that the occurrence and evolution of the magnetic reconnection are driven by the movement of the small sunspot in the photosphere.

学科主题天文学 ; 太阳与太阳系 ; 太阳物理学
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词SOLAR-FLARE ; SPECTROSCOPIC OBSERVATIONS ; CME ; TELESCOPE ; EVOLUTION ; ERUPTION ; DENSITY ; SDO
资助项目National Science Foundation of China (NSFC)[11503080] ; National Science Foundation of China (NSFC)[11633008] ; National Science Foundation of China (NSFC)[11473064] ; National Science Foundation of China (NSFC)[11463003] ; National Science Foundation of China (NSFC)[11573012] ; National Science Foundation of China (NSFC)[11763004] ; CAS
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000431056800001
资助机构National Science Foundation of China (NSFC)[11503080, 11633008, 11473064, 11463003, 11573012, 11763004] ; CAS
源URL[http://ir.ynao.ac.cn/handle/114a53/12367]  
专题云南天文台_抚仙湖太阳观测站
天文技术实验室
通讯作者Xue ZK(薛志科)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming Yunnan 650216, People's Republic of China
2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100012, People's Republic of China
3.Yunnan Key Laboratory of Computer Technology Application/Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, People's Republic of China
4.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
推荐引用方式
GB/T 7714
Xue ZK,Yan XL,Yang LH,et al. Spectral and Imaging Observations of a Current Sheet Region in a Small-scale Magnetic Reconnection Event[J]. ASTROPHYSICAL JOURNAL LETTERS,2018,858(1).
APA Xue ZK.,Yan XL.,Yang LH.,Wang JC.,Feng, Song.,...&Zhao L.(2018).Spectral and Imaging Observations of a Current Sheet Region in a Small-scale Magnetic Reconnection Event.ASTROPHYSICAL JOURNAL LETTERS,858(1).
MLA Xue ZK,et al."Spectral and Imaging Observations of a Current Sheet Region in a Small-scale Magnetic Reconnection Event".ASTROPHYSICAL JOURNAL LETTERS 858.1(2018).

入库方式: OAI收割

来源:云南天文台

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