中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Numerical study of the cascading energy conversion of the reconnection current sheet in solar eruptions

文献类型:期刊论文

作者Ye J(叶景)1,2,3; Shen, Chengcai4; Raymond, John C.4; Lin J(林隽)1,2; Ziegler, Udo5
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2019
卷号482期号:1页码:588-605
ISSN号0035-8711
关键词magnetic reconnection MHD turbulence Sun: coronal mass ejections (CMEs)
DOI10.1093/mnras/sty2716
产权排序第1完成单位
文献子类Article
英文摘要

Magnetic reconnection plays an important role in the energy conversion during solar eruptions. In this work, we present a resistive magnetohydrodynamical study (2.5D) of a flux rope eruption based on the Lin and Forbes model regarding cascading reconnection. We use a second-order Godunov scheme code, to better understand the physical mechanisms responsible for high reconnection rates and the internal structure, particularly in chaotic or turbulent regions, of the coronal mass ejection (CME)/flare current sheet (CS). Two sets of simulations with Lundquist numbers of 1.18 x 10(5) and 2.35 x 10(5) in the vicinity of the CS, generating a slow CME and a moderate one, show global dynamic features largely consistent with the flare model. Looking into the fine structure of the CS, magnetic reconnection employs simultaneously the Sweet-Parker mode and time-dependent small-scale Petschek patterns in the early stage. As the flux rope rises, the outflow region becomes turbulent, which further enhances the reconnection rates. Our results show that coalescence and fusion processes of plasmoids provide a large number of small, transient local diffusion regions to dissipate magnetic energy, and confirm that the dissipation starts at macro-MHD scales rather than ion inertial lengths. The two runs have the same range of the local reconnection rates (10(-4)-0.3) relevant to CMEs. The fast rates are closely proportional to the square of the aspect ratio of multiple small-scale CSs. The topology of the magnetic field and the turbulence spectrum of the energy cascade are statistically addressed as well.

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GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
WOS关键词CORONAL MASS EJECTION ; MAGNETIC RECONNECTION ; FLUX-ROPE ; TRANSPORT SCHEME ; MODEL ; FLARE ; ACCELERATION ; DISRUPTION ; SIMULATION ; ENERGETICS
资助项目Strategic Priority Research Programme of Chinese Academy of Sciences (CAS)[XDA17040507] ; Strategic Priority Research Programme of Chinese Academy of Sciences (CAS)[XDA15010900] ; Strategic Priority Research Programme of Chinese Academy of Sciences (CAS)[QYZDJ-SSWSLH012] ; Programme 973 grant[2013CBA01503] ; National Natural Science Foundation of China (NSFC)[11603070] ; National Natural Science Foundation of China (NSFC)[11333007] ; National Natural Science Foundation of China (NSFC)[U1631130] ; National Science Foundation of U.S. grants[AGS-1358342] ; National Science Foundation of U.S. grants[AGS-1723313] ; National Science Foundation of U.S. grants[AGS-1723425] ; NASA LWS programme through ROSES[NNH13ZDA001N] ; NSFC-Guangdong Joint Fund[nsfc2015 461] ; project of the Group for Innovation of Yunnan Province
WOS研究方向Astronomy & Astrophysics
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:000454575300042
资助机构Strategic Priority Research Programme of Chinese Academy of Sciences (CAS)[XDA17040507, XDA15010900, QYZDJ-SSWSLH012] ; Programme 973 grant[2013CBA01503] ; National Natural Science Foundation of China (NSFC)[11603070, 11333007, U1631130] ; National Science Foundation of U.S. grants[AGS-1358342, AGS-1723313, AGS-1723425] ; NASA LWS programme through ROSES[NNH13ZDA001N] ; NSFC-Guangdong Joint Fund[nsfc2015 461] ; project of the Group for Innovation of Yunnan Province
源URL[http://ir.ynao.ac.cn/handle/114a53/18831]  
专题云南天文台_太阳物理研究组
通讯作者Ye J(叶景); Lin J(林隽)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, PO Box 110, Kunming, Yunnan 650216, China
2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100012, China
3.Key Laboratory of Modern Astronomy and Astrophysical, the Ministry of Education, Nanjing University, Nanjing, 210000, China
4.Smithsonian Astrophysical Observatory, 60 Garden Street, MS 15, Cambridge, MA 02138, US
5.Astrophysikalisches Institut Potsdam, D-14482 Potsdam, Germany
推荐引用方式
GB/T 7714
Ye J,Shen, Chengcai,Raymond, John C.,et al. Numerical study of the cascading energy conversion of the reconnection current sheet in solar eruptions[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,482(1):588-605.
APA Ye J,Shen, Chengcai,Raymond, John C.,Lin J,&Ziegler, Udo.(2019).Numerical study of the cascading energy conversion of the reconnection current sheet in solar eruptions.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,482(1),588-605.
MLA Ye J,et al."Numerical study of the cascading energy conversion of the reconnection current sheet in solar eruptions".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 482.1(2019):588-605.

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来源:云南天文台

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