Unraveling the Trigger Mechanism of Explosive Reconnection in Partially Ionized Solar Plasma
文献类型：期刊论文
| 作者 | Zafar, Abdullah4 ; Ni L(倪蕾)2,3,4; Lin J(林隽)2,3,4; Ali, Ahmad1
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2024-08-01 |
| 卷号 | 971期号:2 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ad5ce7 |
| 产权排序 | 第1完成单位 |
| 文献子类 | Article |
| 英文摘要 | 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. |
| 学科主题 | 天文学 ; 太阳与太阳系 |
| URL标识 | 查看原文 |
| 出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
| WOS关键词 | CHROMOSPHERIC MAGNETIC RECONNECTION ; X-RAY JETS ; MAGNETOHYDRODYNAMIC SIMULATION ; TRANSPORT-COEFFICIENTS ; HYDROGEN ; FLARE ; ACCELERATION ; RESISTIVITY ; ERUPTION ; MODEL |
| 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] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001290615500001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | 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] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/27514]  |
| 专题 | 云南天文台_太阳物理研究组 |
| 作者单位 | 1.Pakistan Tokamak Plasma Research Institute, Islamabad 3329, Pakistan 2.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China; 3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China; 4.Yunnan Observatories, Chinese Academy of Science, Kunming, Yunnan 6502016 People's Republic of China; leini@ynao.ac.cn; |
| 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). |
入库方式： OAI收割
来源：云南天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。