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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
Source PublicationASTROPHYSICAL JOURNAL LETTERS
2018-05-01
Volume858Issue:1
DOI10.3847/2041-8213/aabe77
Contribution Rank第1完成单位
Indexed BySCI
KeywordMagnetic Reconnection Sun: Activity Sun: Magnetic Fields Sun: Transition Region
Abstract

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.

Funding ProjectNational 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
Funding OrganizationNational Science Foundation of China (NSFC)[11503080, 11633008, 11473064, 11463003, 11573012, 11763004] ; CAS
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 太阳物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN2041-8205
URL查看原文
WOS IDWOS:000431056800001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSOLAR-FLARE ; SPECTROSCOPIC OBSERVATIONS ; CME ; TELESCOPE ; EVOLUTION ; ERUPTION ; DENSITY ; SDO
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12367
Collection抚仙湖太阳观测站
Corresponding AuthorXue ZK(薛志科)
Affiliation1.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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
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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