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Observations of Magnetic Reconnection with Large Separatrix Angles and Separatrix Jets above the Solar Surface
Xue ZK(薛志科)1,3,6; Yan XL(闫晓理)1,3; Yang LH(杨丽恒)1,3,6; Chen, J.6; Wang JC(王金成)1,3; Liu Z(刘忠)1,3,4; Lee, K. H.5; Lee, L. C.2,5
刊名ASTROPHYSICAL JOURNAL
2021-07
卷号915期号:1
ISSN号0004-637X
DOI10.3847/1538-4357/abfb71
产权排序第1完成单位
文献子类Article
英文摘要

We analyze six cases of magnetic reconnection with large separatrix angles and separatrix jets observed on the solar disk. The separatrix angle is defined as the angle between the two separatrices on the two sides of the outflow region. The plasma jets are observed immediately downstream of the separatrices. The morphological characteristics and magnetic field configurations of all magnetic reconnections are displayed. At the same time, we calculate several physical parameters of each case, which include the inflow velocity (from 2.3 to 24 km s(-1)), the outflow velocity (from 1.9 to 43 km s(-1)), the separatrix jet velocity (from 13 to 82 km s(-1)), the width (from 0.42 x 10(3) to 1.2 x 10(3) km) and length (from 1.4 x 10(3) to 4.3 x 10(3) km) of the current sheet, and the separatrix angle theta (sep) (from 72 degrees to 128 degrees). We find that the outflow velocity, the separatrix jet velocity, and the width and length of the current sheet are positively related to the inflow velocity, but the separatrix angle does not depend on the inflow velocity and it is related to the initial magnetic field configuration before magnetic reconnection. Meanwhile, the velocities of the outflow and the separatrix jet decrease with increasing vertical bar theta(sep)-90 degrees vertical bar, indicating that when the separatrix angle is close to 90 degrees, the jet and the outflow reach their maximum velocities. These observations are compared with the results of the theoretical model and the numerical simulation.

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
资助项目National Key R&D Program of China[2019YFA0405000] ; National Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC)[11873087] ; National Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC)[11803085] ; National Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC)[11803086] ; National Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC)[11633008] ; National Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC)[U1831210] ; Yunnan Science Foundation of China[2018FB007] ; Yunnan Science Foundation of China[2018FA001] ; Youth Innovation Promotion Association, CAS[2019061] ; Youth Innovation Promotion Association, CAS[2011056] ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories[KLSA202104] ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories[KLSA202101] ; CAS Light of West China Program ; Project of the Group for Innovation of Yunnan Province ; Ministry of Science and Technology in TaiwanMinistry of Science and Technology, Taiwan[MOST 109-2111-M-002-001] ; Science and Technology Development Fund (FDCT) of Macau[0035/2018/AFJ]
WOS关键词CURRENT SHEET ; FIELD RECONNECTION ; MODEL ; LINE ; FILAMENT ; CONNECTION ; INFLOW ; FLARES
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000667937200001
资助机构National Key R&D Program of China[2019YFA0405000] ; National Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC)[11873087, 11803085, 11803086, 11633008, U1831210] ; Yunnan Science Foundation of China[2018FB007, 2018FA001] ; Youth Innovation Promotion Association, CAS[2019061, 2011056] ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories[KLSA202104, KLSA202101] ; CAS Light of West China Program ; Project of the Group for Innovation of Yunnan Province ; Ministry of Science and Technology in TaiwanMinistry of Science and Technology, Taiwan[MOST 109-2111-M-002-001] ; Science and Technology Development Fund (FDCT) of Macau[0035/2018/AFJ]
内容类型期刊论文
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/24457]  
专题云南天文台_抚仙湖太阳观测站
通讯作者Lee, L. C.
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming, People's Republic of China;
2.Space Science Institute, Macau University of Science and Technology, Macau, People's Republic of China; louclee@earth.sinica.edu.tw
3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing, People's Republic of China;
4.University of Chinese Academy of Sciences, Beijing, People's Republic of China;
5.Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan;
6.CAS Key Laboratory of Solar Activity, National Astronomical Observatories, Beijing, People's Republic of China;
推荐引用方式
GB/T 7714
Xue ZK,Yan XL,Yang LH,et al. Observations of Magnetic Reconnection with Large Separatrix Angles and Separatrix Jets above the Solar Surface[J]. ASTROPHYSICAL JOURNAL,2021,915(1).
APA Xue ZK.,Yan XL.,Yang LH.,Chen, J..,Wang JC.,...&Lee, L. C..(2021).Observations of Magnetic Reconnection with Large Separatrix Angles and Separatrix Jets above the Solar Surface.ASTROPHYSICAL JOURNAL,915(1).
MLA Xue ZK,et al."Observations of Magnetic Reconnection with Large Separatrix Angles and Separatrix Jets above the Solar Surface".ASTROPHYSICAL JOURNAL 915.1(2021).
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