Numerical Studies of Magnetic Reconnection and Heating Mechanisms for the Ellerman Bomb

doi:10.1088/1674-4527/acafc3

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	Numerical Studies of Magnetic Reconnection and Heating Mechanisms for the Ellerman Bomb
	Liu MY(刘明玉)1,2 ; Ni L(倪蕾)1,2,3 ; Cheng GC(程冠冲)1,2 ; Ziegler, Udo 4; Lin J(林隽)1,2,3
发表期刊	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2023-03-01
卷号	23 期号:3
DOI	10.1088/1674-4527/acafc3
产权排序	第1完成单位
收录类别	SCI
关键词	magnetic reconnection magnetohydrodynamics (MHD) Sun: chromosphere Sun: activity
摘要	An Ellerman Bomb (EB) is a kind of small scale reconnection event, which is ubiquitously formed in the upper photosphere or the lower chromosphere. The low temperature (<10,000 K) and high density (similar to 10(19)-10(22)) plasma there makes the magnetic reconnection process strongly influenced by partially ionized effects and radiative cooling. This work studies the high beta magnetic reconnection near the solar temperature minimum region based on high-resolution 2.5D magnetohydrodynamics simulations. The time-dependent ionization degree of hydrogen and helium are included to realize more realistic diffusivities, viscosity and radiative cooling in simulations. Numerical results show that the reconnection rate is smaller than 0.01 and decreases with time during the early quasi-steady stage, then sharply increases to a value above 0.05 in the later stage as the plasmoid instability takes place. Both the large value of eta (en) (magnetic diffusion caused by the electron-neutral collision) and the plasmoid instability contribute to the fast magnetic reconnection in the EB-like event. The interactions and coalescence of plasmoids strongly enhance the local compression heating effect, which becomes the dominant mechanism for heating in EBs after plasmoid instability appears. However, the Joule heating contributed by eta (en) can play a major role to heat plasmas when the magnetic reconnection in EBs is during the quasi-steady stage with smaller temperature increases. The results also show that the radiative cooling effect suppresses the temperature increase to a reasonable range, and increases the reconnection rate and generation of thermal energy.
资助项目	National Key R&D Program of China[2022YFF0503800] ; National Natural Science Foundation of China (NSFC)[11973083] ; National Natural Science Foundation of China (NSFC)[11933009] ; Strategic Priority Research Program of CAS[XDA17040507] ; Youth Innovation Promotion Association CAS[Y2021024] ; Applied Basic Research of Yunnan Province in China[2018FB009] ; Yunling Talent Project for the Youth ; Group for Innovation of Yunnan Province[2018HC023] ; Yunling Scholar Project of the Yunnan Province ; Yunnan Province Scientist Workshop of Solar Physics ; Yunnan Key Laboratory of Solar Physics and Space Exploration[202205AG070009]
项目资助者	National Key R&D Program of China[2022YFF0503800] ; National Natural Science Foundation of China (NSFC)[11973083, 11933009] ; Strategic Priority Research Program of CAS[XDA17040507] ; Youth Innovation Promotion Association CAS[Y2021024] ; Applied Basic Research of Yunnan Province in China[2018FB009] ; Yunling Talent Project for the Youth ; Group for Innovation of Yunnan Province[2018HC023] ; Yunling Scholar Project of the Yunnan Province ; Yunnan Province Scientist Workshop of Solar Physics ; Yunnan Key Laboratory of Solar Physics and Space Exploration[202205AG070009]
语种	英语
学科领域	天文学 ; 太阳与太阳系 ; 太阳物理学
文章类型	Article
出版者	NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
出版地	20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA
ISSN	1674-4527
URL	查看原文
WOS记录号	WOS:000943835300001
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	TRANSPORT-COEFFICIENTS ; SOLAR CHROMOSPHERE ; FLARE ; SIMULATIONS ; ATMOSPHERE ; HYDROGEN ; IRIS ; MHD
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.ynao.ac.cn/handle/114a53/25874
专题	太阳物理研究组
通讯作者	Ni L(倪蕾)
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China; [email protected]; 2.University of Chinese Academy of Sciences, Beijing 100049, China; 3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100101, China; 4.Astrophysikalisches Institut Potsdam D-14482 Potsdam, Germany
第一作者单位	中国科学院云南天文台
通讯作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Liu MY,Ni L,Cheng GC,et al. Numerical Studies of Magnetic Reconnection and Heating Mechanisms for the Ellerman Bomb[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2023,23(3).
APA	Liu MY,Ni L,Cheng GC,Ziegler, Udo,&Lin J.(2023).Numerical Studies of Magnetic Reconnection and Heating Mechanisms for the Ellerman Bomb.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,23(3).
MLA	Liu MY,et al."Numerical Studies of Magnetic Reconnection and Heating Mechanisms for the Ellerman Bomb".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 23.3(2023).

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