The origin of underdense plasma downflows associated with magnetic reconnection in solar flares
文献类型:期刊论文
作者 | Shen, Chengcai6; Chen, Bin5; Reeves, Katharine K.6; Yu, Sijie5; Polito, Vanessa3,4; Xie XY(谢小妍)1,2,6 |
刊名 | NATURE ASTRONOMY |
出版日期 | 2022-01-27 |
ISSN号 | 2397-3366 |
DOI | 10.1038/s41550-021-01570-2 |
产权排序 | 第5完成单位 |
文献子类 | Article; Early Access |
英文摘要 | Magnetic reconnection is a universal process that powers explosive energy-release events such as solar flares, geomagnetic substorms and some astrophysical jets. A characteristic feature of magnetic reconnection is the production of fast reconnection outflow jets near the plasma Alfven speeds(1,2). In eruptive solar flares, dark finger-shaped plasma downflows moving toward the flare arcade have been commonly regarded as the principal observational evidence for such reconnection-driven outflows(3,4). However, they often show a speed much slower than that expected in reconnection theories(5,6), challenging the reconnection-driven energy-release scenario in standard flare models. Here we present a three-dimensional magnetohydrodynamics model of solar flares. By comparing the model predictions with the observed plasma downflow features, we conclude that these dark downflows are self-organized structures formed in a turbulent interface region below the flare termination shock where the outflows meet the flare arcade, a phenomenon analogous to the formation of similar structures in supernova remnants. This interface region hosts a myriad of turbulent flows, electron currents and shocks, crucial for flare energy release and particle acceleration. |
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 | HEIDELBERGER PLATZ 3, BERLIN, 14197, GERMANY |
WOS关键词 | PARTICLE-ACCELERATION ; SUPERNOVA-REMNANT ; CURRENT SHEET ; ENERGY ; FIELD ; POWER ; SHOCK |
资助项目 | National Science FoundationNational Science Foundation (NSF)[AST-1735525] ; National Science FoundationNational Science Foundation (NSF)[AGS-1723313] ; National Science FoundationNational Science Foundation (NSF)[AGS-1723425] ; National Science FoundationNational Science Foundation (NSF)[AGS1654382] ; National Science FoundationNational Science Foundation (NSF)[AGS-1723436] ; National Science FoundationNational Science Foundation (NSF)[AST-1735405] ; National Science FoundationNational Science Foundation (NSF)[AGS-1723409] ; Chinese Academy of SciencesChinese Academy of Sciences[XDA17040507] ; Chinese Academy of SciencesChinese Academy of Sciences[QYZDJ-SSWSLH012] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11933009] ; National Natural Science Foundation of Yunnan Province[2018HC023] ; China Scholarship CouncilChina Scholarship Council[201904910573] |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | NATURE PORTFOLIO |
WOS记录号 | WOS:000748673400002 |
资助机构 | National Science FoundationNational Science Foundation (NSF)[AST-1735525, AGS-1723313, AGS-1723425, AGS1654382, AGS-1723436, AST-1735405, AGS-1723409] ; Chinese Academy of SciencesChinese Academy of Sciences[XDA17040507, QYZDJ-SSWSLH012] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11933009] ; National Natural Science Foundation of Yunnan Province[2018HC023] ; China Scholarship CouncilChina Scholarship Council[201904910573] |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/24843] |
专题 | 云南天文台_太阳物理研究组 |
通讯作者 | Shen, Chengcai |
作者单位 | 1.University of Chinese Academy of Sciences, Beijing, China 2.Yunnan Observatories, Chinese Academy of Sciences, Kunming, China; 3.Lockheed Martin Solar and Astrophysics Laboratory, Palo Alto, USA; 4.Bay Area Environmental Research Institute, NASA Research Park, Moffett Field, USA; 5.Center for Solar Terrestrial Research, New Jersey Institute of Technology, University Heights, Newark, USA; 6.Center for Astrophysics ∣ Harvard & Smithsonian, Cambridge, USA; |
推荐引用方式 GB/T 7714 | Shen, Chengcai,Chen, Bin,Reeves, Katharine K.,et al. The origin of underdense plasma downflows associated with magnetic reconnection in solar flares[J]. NATURE ASTRONOMY,2022. |
APA | Shen, Chengcai,Chen, Bin,Reeves, Katharine K.,Yu, Sijie,Polito, Vanessa,&Xie XY.(2022).The origin of underdense plasma downflows associated with magnetic reconnection in solar flares.NATURE ASTRONOMY. |
MLA | Shen, Chengcai,et al."The origin of underdense plasma downflows associated with magnetic reconnection in solar flares".NATURE ASTRONOMY (2022). |
入库方式: OAI收割
来源:云南天文台
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