Three-dimensional magnetic reconnection mediated with plasmoids and the resulting multithermal emissions in the cool atmosphere of the Sun
文献类型：期刊论文
| 作者 | Cheng GC(程冠冲)1,2,5; Ni L(倪蕾)1,4,5; Cameron, Robert2; Peter, Hardi2,3; Chen, Yajie2; Lin J(林隽)1,4,5 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2025-09-18 |
| 卷号 | 701 |
| 关键词 | magnetic reconnection Sun: activity Sun: chromosphere Sun: magnetic fields |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202554204 |
| 产权排序 | 第1完成单位 |
| 文献子类 | Article |
| 英文摘要 | Context. Flux emergence is ubiquitous in the Sun's lower atmosphere. The emerging flux can reconnect with the pre-existing magnetic field. Aims. We aim to investigate plasmoid formation and the resulting multithermal emissions during the three-dimensional reconnection process in the lower solar atmosphere. Methods. We conducted 3D radiation magnetohydrodynamic (RMHD) simulations using the MURaM code, which incorporates solar convection and radiation. We simulated the emergence of a flat magnetic flux sheet that was introduced into the convection zone. For comparison with results previously reported from observations, we employed the RH1.5D code to synthesize H alpha and Si IV spectral line profiles and we synthesized the ultraviolet images using the optical thin methods. Results. Flux emergence took place as part of the imposed flux tube crossed the photosphere. In the lower solar atmosphere, magnetic reconnection occurred and formed thin, elongated current sheets. Plasmoid-like features appear as part of the reconnection process; this results in many small twisted magnetic flux ropes, which are expelled toward the two ends of the reconnection region. Consequently, hot plasma with a temperature exceeding 20 000 K and much cooler plasmas with a temperature below 10 000 K can coexist in the reconnection region. Synthesized images and spectral line profiles through the reconnection region display typical characteristics of reconnection occuring in the lower solar atmosphere, such as Ellerman bombs (EBs) and UV bursts. The cooler plasmas that show characteristics of EBs can be found above hot plasma and reach altitudes more than 2 Mm above the solar surface. Meanwhile, some hot plasma that features characteristics of UV bursts can extend downward to the lower chromosphere, approximately 0.7 Mm above the solar surface. Conclusions. Our simulation results indicate that the turbulent reconnection mediated with plasmoid instability can occur in small-scale reconnection events such as EBs and UV bursts. The coexistence of hot and much cooler plasmas in such a turbulent reconnection process can well explain the temporal and spatical connection of UV bursts with EBs. |
| 学科主题 | 天文学 ; 太阳与太阳系 |
| URL标识 | 查看原文 |
| 出版地 | 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE |
| WOS关键词 | ELLERMAN BOMBS ; SOLAR ; SIMULATIONS ; EVENTS ; SURFACE |
| 资助项目 | N/A |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001575590400008 |
| 出版者 | EDP SCIENCES S A |
| 资助机构 | N/A |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28580]  |
| 专题 | 云南天文台_太阳物理研究组 |
| 通讯作者 | Ni L(倪蕾); Cameron, Robert |
| 作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, Kunming, Yunnan 650216, PR China; 2.Max Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, 37077 Göttingen, Germany; 3.Institute for Solar Physics (KIS), Georges-Köhler-Allee 401A, 79110 Freiburg, Germany 4.Yunnan Key Laboratory of Solar Physics and Space Science, Kunming 650216, PR China; 5.University of Chinese Academy of Sciences, Beijing 100049, PR China; |
| 推荐引用方式 GB/T 7714 | Cheng GC,Ni L,Cameron, Robert,et al. Three-dimensional magnetic reconnection mediated with plasmoids and the resulting multithermal emissions in the cool atmosphere of the Sun[J]. ASTRONOMY & ASTROPHYSICS,2025,701. |
| APA | 程冠冲,倪蕾,Cameron, Robert,Peter, Hardi,Chen, Yajie,&林隽.(2025).Three-dimensional magnetic reconnection mediated with plasmoids and the resulting multithermal emissions in the cool atmosphere of the Sun.ASTRONOMY & ASTROPHYSICS,701. |
| MLA | 程冠冲,et al."Three-dimensional magnetic reconnection mediated with plasmoids and the resulting multithermal emissions in the cool atmosphere of the Sun".ASTRONOMY & ASTROPHYSICS 701(2025). |
入库方式： OAI收割
来源：云南天文台
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