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Frequently Occurring Reconnection Jets from Sunspot Light Bridges
Tian, Hui1; Yurchyshyn, Vasyl2,3; Peter, Hardi4; Solanki, Sami K.4,5; Young, Peter R.6,7,8; Ni L(倪蕾)9; Cao, Wenda2; Ji KF(季凯帆)9; Zhu, Yingjie1; Zhang, Jingwen1; Samanta, Tanmoy1; Song, Yongliang1; He, Jiansen1; Wang, Linghua1; Chen, Yajie1; Tian, Hui(Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China)
发表期刊ASTROPHYSICAL JOURNAL
2018-02-20
卷号854期号:2
DOI10.3847/1538-4357/aaa89d
产权排序第9完成单位
收录类别SCI
关键词Magnetic Reconnection Sun: Chromosphere Sunspots Sun: Transition Region Sun: Uv Radiation
摘要Solid evidence of magnetic reconnection is rarely reported within sunspots, the darkest regions with the strongest magnetic fields and lowest temperatures in the solar atmosphere. Using the world's largest solar telescope, the 1.6 m Goode Solar Telescope, we detect prevalent reconnection through frequently occurring fine-scale jets in the Ha line wings at light bridges, the bright lanes that may divide the dark sunspot core into multiple parts. Many jets have an inverted Y-shape, shown by models to be typical of reconnection in a unipolar field environment. Simultaneous spectral imaging data from the Interface Region Imaging Spectrograph show that the reconnection drives bidirectional flows up to 200(.) km(.) s(-1), and that the weakly ionized plasma is heated by at least an order of magnitude up to similar to 80,000 K. Such highly dynamic reconnection jets and efficient heating should be properly accounted for in future modeling efforts of sunspots. Our observations also reveal that the surge-like activity previously reported above light bridges in some chromospheric passbands such as the Ha core has two components: the ever-present short surges likely to be related to the upward leakage of magnetoacoustic waves from the photosphere, and the occasionally occurring long and fast surges that are obviously caused by the intermittent reconnection jets.
项目资助者NJIT ; US NSF(AGS-1250818) ; NASA(NNX13AG14G) ; Korea Astronomy and Space Science Institute (KASI), Seoul National University ; Strategic Priority Research Program of CAS(XDB09000000) ; ESA ; Norwegian Space Center ; NSFC(11790304, 41574166, 11573064, 11729301, 11573012, 11790300) ; Recruitment Program of Global Experts of China ; Max Planck Partner Group program, NASA grant(NNX15AF48G) ; European Research Council (ERC) under the European Union's Horizon research and innovation program(695075) ; BK21 plus program through the National Research Foundation (NRF) - Ministry of Education of Korea ; ISSI Bern international team "Solar UV bursts-a new insight to magnetic reconnection" ; AFOSR(FA9550-15-1-0322) ; NSF(AST-1614457) ; KASI
语种英语
学科领域天文学
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000425306100015
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]X-RAY JETS ; MAGNETIC RECONNECTION ; ELLERMAN BOMBS ; ACTIVE-REGION ; EXPLOSIVE EVENTS ; DYNAMIC FIBRILS ; FLUX EMERGENCE ; PLASMA EJECTIONS ; CORONAL HOLE ; SOLAR-WIND
引用统计
被引频次:4[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/114a53/12292
专题太阳物理研究组
通讯作者Tian, Hui(Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China)
作者单位1.School of Earth and Space Sciences, Peking University, Beijing 100871, People's Republic of China
2.Big Bear Solar Observatory, New Jersey Institute of Technology, 40386 North Shore Lane, Big Bear City, CA 92314-9672, USA
3.Korea Astronomy and Space Science Institute, 776 Daedeok-daero, Yuseong-gu, Daejeon, 305-348, Republic of Korea
4.Max Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, D-37077 Göttingen, Germany
5.School of Space Research, Kyung Hee University, Yongin, Gyeonggi-Do,446-701, Republic of Korea
6.College of Science, George Mason University, Fairfax, VA 22030, USA
7.Code 671, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
8.Northumbria University, Newcastle Upon Tyne, NE1 8ST, UK
9.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
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Tian, Hui,Yurchyshyn, Vasyl,Peter, Hardi,et al. Frequently Occurring Reconnection Jets from Sunspot Light Bridges[J]. ASTROPHYSICAL JOURNAL,2018,854(2).
APA Tian, Hui.,Yurchyshyn, Vasyl.,Peter, Hardi.,Solanki, Sami K..,Young, Peter R..,...&Tian, Hui.(2018).Frequently Occurring Reconnection Jets from Sunspot Light Bridges.ASTROPHYSICAL JOURNAL,854(2).
MLA Tian, Hui,et al."Frequently Occurring Reconnection Jets from Sunspot Light Bridges".ASTROPHYSICAL JOURNAL 854.2(2018).
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