From Photospheric Footpoint Motion to Plasmoid Ejection: A Two-stage Reconnection Process in a Small-scale Chromospheric Jet
文献类型：期刊论文
| 作者 | Tang ZH(汤泽浩)2,3; Shen, Yuandeng1,4; Liu DX(刘东旭)2; Yao SR(姚苏芮)2; Zhou CR(周承瑞)2; Li XB(李小波)2 |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2025-09-01 |
| 卷号 | 990期号:1 |
| ISSN号 | 2041-8205 |
| DOI | 10.3847/2041-8213/adf0fe |
| 产权排序 | 第1完成单位 |
| 文献子类 | Article |
| 英文摘要 | Using high-spatiotemporal-resolution multiwavelength observations from the New Vacuum Solar Telescope and the Solar Dynamics Observatory, we present a detailed analysis of a small-scale chromospheric jet driven by plasmoid-mediated magnetic reconnection. Our results reveal that the entire process is governed by the dynamic evolution of photospheric magnetic footpoints, which proceeds in two distinct stages. An initial separating motion of the footpoints corresponds to a mild reconnection phase, characterized by a short current sheet and the eruption of a cool H alpha jet. Subsequently, a converging motion of the footpoints triggers an intense reconnection phase. During this intense stage, the current sheet rapidly elongates, and the resulting decrease in its aspect ratio initiates a tearing-mode instability, forming a plasmoid. The appearance of this plasmoid mediates the onset of fast magnetic reconnection, which produces a hot extreme ultraviolet jet and is concurrent with significant magnetic flux cancellation. We interpret this cancellation as the submergence of newly formed postreconnection loops. Furthermore, we identify a distinct, high-temperature plasma blob in the jet spire, significantly hotter than the surrounding jet plasma. We attribute this feature to a secondary heating process, likely caused by reconnection between the upward-propagating plasmoid and the overlying magnetic cusp structure. These observations provide a comprehensive, observationally driven picture (from the initial photospheric triggers to the multistage plasmoid-mediated reconnection) that forms chromospheric jets, highlighting the critical role of footpoint motions in solar atmospheric dynamics. |
| 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 | CANCELLATION NANOFLARE MODEL ; FLARE CURRENT SHEET ; MAGNETIC RECONNECTION ; ANEMONE JETS ; X-RAY ; ELECTRON ACCELERATION ; FILAMENT ERUPTIONS ; SOLAR FILAMENT ; BLOWOUT JET ; FLUX ROPE |
| 资助项目 | MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809; New Vacuum Solar Telescope (NVST)[12173083]; Natural Science Foundation of China[ZDSYS20210702140800001]; Shenzhen Key Laboratory Launching Project; Specialized Research Fund for the State Key Laboratory of Solar Activity and Space Weather |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001563000500001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809 ; New Vacuum Solar Telescope (NVST)[12173083] ; Natural Science Foundation of China[ZDSYS20210702140800001] ; Shenzhen Key Laboratory Launching Project ; Specialized Research Fund for the State Key Laboratory of Solar Activity and Space Weather |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28567]  |
| 专题 | 云南天文台_抚仙湖太阳观测站 |
| 通讯作者 | Shen, Yuandeng |
| 作者单位 | 1.State Key Laboratory of Solar Activity and Space Weather, School of Aerospace, Harbin Institute of Technology, Shenzhen 518055, People’s Republic of China; ydshen@hit.edu.cn; 2.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People’s Republic of China; 3.University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China; 4.Shenzhen Key Laboratory of Numerical Prediction for Space Storm, Harbin Institute of Technology, Shenzhen 518055, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Tang ZH,Shen, Yuandeng,Liu DX,et al. From Photospheric Footpoint Motion to Plasmoid Ejection: A Two-stage Reconnection Process in a Small-scale Chromospheric Jet[J]. ASTROPHYSICAL JOURNAL LETTERS,2025,990(1). |
| APA | 汤泽浩,Shen, Yuandeng,刘东旭,姚苏芮,周承瑞,&李小波.(2025).From Photospheric Footpoint Motion to Plasmoid Ejection: A Two-stage Reconnection Process in a Small-scale Chromospheric Jet.ASTROPHYSICAL JOURNAL LETTERS,990(1). |
| MLA | 汤泽浩,et al."From Photospheric Footpoint Motion to Plasmoid Ejection: A Two-stage Reconnection Process in a Small-scale Chromospheric Jet".ASTROPHYSICAL JOURNAL LETTERS 990.1(2025). |
入库方式： OAI收割
来源：云南天文台
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