YNAO OpenIR  > 抚仙湖太阳观测和研究基地
Spectral and Imaging Observations of a Current Sheet Region in a Small-scale Magnetic Reconnection Event
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
发表期刊ASTROPHYSICAL JOURNAL LETTERS
2018-05-01
卷号858期号:1
DOI10.3847/2041-8213/aabe77
产权排序第1完成单位
收录类别SCI
关键词Magnetic Reconnection Sun: Activity Sun: Magnetic Fields Sun: Transition Region
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.

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 'Light of West China' Program ; Youth Innovation Promotion Associated CAS[201156] ; Project of the Group for Innovation of Yunnan Province
项目资助者National Science Foundation of China (NSFC)[11503080, 11633008, 11473064, 11463003, 11573012, 11763004] ; CAS 'Light of West China' Program ; Youth Innovation Promotion Associated CAS[201156] ; Project of the Group for Innovation of Yunnan Province
语种英语
学科领域天文学 ; 太阳与太阳系 ; 太阳物理学
学科门类理学 ; 理学::天文学
文章类型Article
出版者IOP PUBLISHING LTD
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN2041-8205
URL查看原文
WOS记录号WOS:000431056800001
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]SOLAR-FLARE ; SPECTROSCOPIC OBSERVATIONS ; CME ; TELESCOPE ; EVOLUTION ; ERUPTION ; DENSITY ; SDO
引用统计
被引频次:22[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/12367
专题抚仙湖太阳观测和研究基地
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
第一作者单位中国科学院云南天文台
通讯作者单位中国科学院云南天文台
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).
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