Unraveling the Trigger Mechanism of Explosive Reconnection in Partially Ionized Solar Plasma

doi:10.3847/1538-4357/ad5ce7

YNAO OpenIR > 太阳物理研究组

	Unraveling the Trigger Mechanism of Explosive Reconnection in Partially Ionized Solar Plasma
	Zafar, Abdullah1 ; Ni L(倪蕾)1,2,3 ; Lin J(林隽)1,2,3 ; Ali, Ahmad 4
发表期刊	ASTROPHYSICAL JOURNAL
	2024-08-01
卷号	971 期号:2
DOI	10.3847/1538-4357/ad5ce7
产权排序	第1完成单位
收录类别	SCI
摘要	Plasmoid instability usually accounts for the onset of fast reconnection events observed in astrophysical plasmas. However, the measured reconnection rate from observations can be one order of magnitude higher than that derived from magnetohydrodynamic (MHD) simulations. In this study, we present the results of magnetic reconnection in the partially ionized low solar atmosphere based on 2.5D MHD simulations. The whole reconnection process covers two different fast reconnection phases. In the first phase, the slow Sweet-Parker reconnection transits to the plasmoid-mediated reconnection, and the reconnection rate reaches about 0.02. In the second phase, a faster explosive reconnection appears, with the reconnection rate reaching above 0.06. At the same time, a sharp decrease in plasma temperature and density at the principle X-point is observed, which is associated with the strong radiative cooling, the ejection of hot plasma from the local reconnection region, or the motion of the principle X-point from a hot and dense region to a cool and less dense region along the narrow current sheet. This causes gas pressure depletion and increases magnetic diffusion at the main X-point, resulting in the local Petschek-like reconnection and a violent and rapid increase in the reconnection rate. This study for the first time reveals a common phenomenon where the plasmoid-dominated reconnection transits to an explosive faster reconnection with a rate approaching the order of 0.1 in partially ionized plasma in the MHD scale.
资助项目	National Key R&D Program of China[2022YFF0503804 (2022YFF0503800)]; National Key R&D Program of China[2022YFF0503003 (2022YFF0503000)]; NSFC[11933009]; NSFC[12373060]; Strategic Priority Research Program of CAS[XDB0560000]; Strategic Priority Research Program of CAS[XDA17040507]; Youth Innovation Promotion Association CAS[Y2021024]; Yunling Talent Project for the Youth; Basic Research of Yunnan Province in China[202401AS070044]; Yunling Scholar Project of the Yunnan Province; Yunnan Province Scientist Workshop of Solar Physics; Yunnan Key Laboratory of Solar Physics and Space Science[202205AG070009]
项目资助者	National Key R&D Program of China[2022YFF0503804 (2022YFF0503800), 2022YFF0503003 (2022YFF0503000)] ; NSFC[11933009, 12373060] ; Strategic Priority Research Program of CAS[XDB0560000, XDA17040507] ; Youth Innovation Promotion Association CAS[Y2021024] ; Yunling Talent Project for the Youth ; Basic Research of Yunnan Province in China[202401AS070044] ; Yunling Scholar Project of the Yunnan Province ; Yunnan Province Scientist Workshop of Solar Physics ; Yunnan Key Laboratory of Solar Physics and Space Science[202205AG070009]
语种	英语
学科领域	天文学 ; 太阳与太阳系
文章类型	Article
出版者	IOP Publishing Ltd
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN	0004-637X
URL	查看原文
WOS记录号	WOS:001290615500001
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	CHROMOSPHERIC MAGNETIC RECONNECTION ; X-RAY JETS ; MAGNETOHYDRODYNAMIC SIMULATION ; TRANSPORT-COEFFICIENTS ; HYDROGEN ; FLARE ; ACCELERATION ; RESISTIVITY ; ERUPTION ; MODEL
引用统计
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.ynao.ac.cn/handle/114a53/27514
专题	太阳物理研究组
作者单位	1.Yunnan Observatories, Chinese Academy of Science, Kunming, Yunnan 6502016 People's Republic of China; [email protected]; 2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China; 3.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China; 4.Pakistan Tokamak Plasma Research Institute, Islamabad 3329, Pakistan
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Zafar, Abdullah,Ni L,Lin J,et al. Unraveling the Trigger Mechanism of Explosive Reconnection in Partially Ionized Solar Plasma[J]. ASTROPHYSICAL JOURNAL,2024,971(2).
APA	Zafar, Abdullah,倪蕾,林隽,&Ali, Ahmad.(2024).Unraveling the Trigger Mechanism of Explosive Reconnection in Partially Ionized Solar Plasma.ASTROPHYSICAL JOURNAL,971(2).
MLA	Zafar, Abdullah,et al."Unraveling the Trigger Mechanism of Explosive Reconnection in Partially Ionized Solar Plasma".ASTROPHYSICAL JOURNAL 971.2(2024).

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