Witnessing Magnetic Reconnection in Tangled Superpenumbral Fibrils around a Sunspot
文献类型：期刊论文
| 作者 | Chen, Hechao2,3,5; Tian, Hui2; Priest, Eric R.6; Prior, Christopher B.7; Xia, Chun2,5; Yeates, Anthony R.7; Yan XL(闫晓理)4,5; Duan YD(段雅丹)4,5; Hou, Zhenyong2; Huang, Zhenghua1 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2025-12-10 |
| 卷号 | 995期号:1 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ae12e9 |
| 产权排序 | 第6完成单位 |
| 文献子类 | Article |
| 英文摘要 | 3D magnetic reconnection is a fundamental plasma process crucial for heating the solar corona and generating the solar wind, but resolving and characterizing it for the Sun remain challenging. Using high-quality data from the Chinese New Vacuum Solar Telescope, the Solar Dynamics Observatory, and the Interface Region Imaging Spectrograph, this work presents highly suggestive direct imaging evidence of magnetic reconnection during the untangling of braided magnetic structures above a sunspot. These magnetic structures, visible as bright superpenumbral threads in extreme-ultraviolet passbands, initially bridge opposite-polarity magnetic fluxes and then gradually tangle in their middle section. Magnetic extrapolation reveals the fibrils to form a small flux rope that is twisted and braided, possibly created by persistent and complex photospheric motions. During untangling, repetitive reconnection events occur inside the flux rope, accompanied by transient plasma heating, bidirectional outflowing blobs, and signatures of nanojets. An emission analysis reveals that the outflowing blobs are multithermal structures with temperatures well below 1 MK, undergoing rapid cooling and leaving emission imprints in H alpha images. The measured reconnection angles indicate that 16%-22% of the magnetic field along each thread is antiparallel, with the remaining field acting as a guide field. The estimated energy released during these reconnection events is comparable to nanoflares, which can be powered by up to 6% of the magnetic energy stored in the antiparallel field. This work presents a textbook example of magnetic flux rope reconnection in the solar atmosphere, providing new insights into fine-scale energy release processes within sunspot superpenumbral fibrils. |
| 学科主题 | 天文学 ; 太阳与太阳系 |
| URL标识 | 查看原文 |
| 出版地 | No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND |
| WOS关键词 | SUBARCSECOND BRIGHT DOTS ; ACTIVE-REGION ; TRANSITION-REGION ; SPECTROSCOPIC DIAGNOSTICS ; SOLAR CHROMOSPHERE ; PLASMA BLOBS ; FIELD ; LOOPS ; NANOFLARES ; EVOLUTION |
| 资助项目 | NSFC[12303057]; Yunnan Key Laboratory of Solar Physics and Space Science[202205AG070009]; Yunnan Provincial Basic Research Project[202401CF070165]; Yunnan Provincial Basic Research Project[UKRI1216]; UK Science and Technology funding council[ST/W00108X/1]; NSFC grant[12073022]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB0560000]; Center for Astronomical Mega-Science, Chinese Academy of Science - ESA; Norwegian Space Center; Star (LWS) program |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001632640500001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | NSFC[12303057] ; Yunnan Key Laboratory of Solar Physics and Space Science[202205AG070009] ; Yunnan Provincial Basic Research Project[202401CF070165, UKRI1216] ; UK Science and Technology funding council[ST/W00108X/1] ; NSFC grant[12073022] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB0560000] ; Center for Astronomical Mega-Science, Chinese Academy of Science - ESA ; Norwegian Space Center ; Star (LWS) program |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28776]  |
| 专题 | 云南天文台_抚仙湖太阳观测站 |
| 通讯作者 | Chen, Hechao; Tian, Hui |
| 作者单位 | 1.Institute of Science and Technology for Deep Space Exploration, Suzhou Campus, Nanjing University, Suzhou 215163, People’s Republic of China 2.School of Earth and Space Sciences, Peking University, Beijing 100871, People’s Republic of China; huitian@pku.edu.cn; 3.School of Physics and Astronomy, Yunnan University, Kunming 650500, People’s Republic of China; hechao.chen@ynu.edu.cn; 4.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People’s Republic of China; 5.Yunnan Key Laboratory of the Solar Physics and Space Science, Kunming 650216, People’s Republic of China; 6.School of Mathematics and Statistics, University of St Andrews, St Andrews KY16 9SS, UK; 7.Department of Mathematical Sciences, Durham University, Durham DH1 3LE, UK; |
| 推荐引用方式 GB/T 7714 | Chen, Hechao,Tian, Hui,Priest, Eric R.,et al. Witnessing Magnetic Reconnection in Tangled Superpenumbral Fibrils around a Sunspot[J]. ASTROPHYSICAL JOURNAL,2025,995(1). |
| APA | Chen, Hechao.,Tian, Hui.,Priest, Eric R..,Prior, Christopher B..,Xia, Chun.,...&Rice, Oliver E. K..(2025).Witnessing Magnetic Reconnection in Tangled Superpenumbral Fibrils around a Sunspot.ASTROPHYSICAL JOURNAL,995(1). |
| MLA | Chen, Hechao,et al."Witnessing Magnetic Reconnection in Tangled Superpenumbral Fibrils around a Sunspot".ASTROPHYSICAL JOURNAL 995.1(2025). |
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来源：云南天文台
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