Evidence for Plasmoid-mediated Magnetic Reconnection during a Small-scale Flare in the Partially Ionized Low Solar Atmosphere
文献类型：期刊论文
| 作者 | Cheng,Guanchong3,4 ; Ni,Lei2,3,4; Tang,Zehao3,4; Chen,Yajie1; Chen,Yuhao3,4; Hu,Jialiang3,4; Lin,Jun2,3,4; Lin J(林隽); Ni L(倪蕾); Tang ZH(汤泽浩)
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| 刊名 | The Astrophysical Journal Letters
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| 出版日期 | 2024-05-01 |
| 卷号 | 966期号:2 |
| ISSN号 | 2041-8205 |
| DOI | 10.3847/2041-8213/ad4027 |
| 通讯作者 | Ni,Lei() |
| 英文摘要 | Abstract Magnetic reconnection plays a crucial role in the energy release process for different kinds of solar eruptions and activities. The rapid solar eruption requires a fast reconnection model. Plasmoid instability in the reconnecting current sheets is one of the most acceptable fast reconnection mechanisms for explaining the explosive events in the magnetohydrodynamics (MHD) scale, which is also a potential bridge between the macroscopic MHD reconnection process and microscale dissipations. Plenty of high-resolution observations indicate that the plasmoid-like structures exist in the high-temperature solar corona, but such evidences are very rare in the lower solar atmosphere with partially ionized plasmas. Utilizing joint observations from the Goode Solar Telescope and the Solar Dynamics Observatory, we discovered a small-scale eruptive phenomenon in NOAA Active Region 13085, characterized by clear reconnection cusp structures, supported by nonlinear force-free field extrapolation results. The plasmoid-like structures with a size of about 150 km were observed to be ejected downward from the current sheet at a maximum velocity of 24 km s?1 in the Hα line wing images, followed by enhanced emissions at around the postflare loop region in multiple wavelengths. Our 2.5D high-resolution MHD simulations further reproduced such a phenomenon and revealed reconnection fine structures. These results provide comprehensive evidences for the plasmoid-mediated reconnection in partially ionized plasmas, and suggest a unified reconnection model for solar flares with different length scales from the lower chromosphere to the corona. |
| 语种 | 英语 |
| WOS记录号 | IOP:APJL_966_2_L29 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/27370]  |
| 专题 | 云南天文台_太阳物理研究组 云南天文台_选址与日冕观测组 |
| 通讯作者 | Ni,Lei; Ni L(倪蕾) |
| 作者单位 | 1.Max Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, 37077, G?ttingen, Germany 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.Yunnan Observatories, Chinese Academy of Sciences, Kunming, Yunnan 650216, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Cheng,Guanchong,Ni,Lei,Tang,Zehao,et al. Evidence for Plasmoid-mediated Magnetic Reconnection during a Small-scale Flare in the Partially Ionized Low Solar Atmosphere[J]. The Astrophysical Journal Letters,2024,966(2). |
| APA | Cheng,Guanchong.,Ni,Lei.,Tang,Zehao.,Chen,Yajie.,Chen,Yuhao.,...&Hu JL.(2024).Evidence for Plasmoid-mediated Magnetic Reconnection during a Small-scale Flare in the Partially Ionized Low Solar Atmosphere.The Astrophysical Journal Letters,966(2). |
| MLA | Cheng,Guanchong,et al."Evidence for Plasmoid-mediated Magnetic Reconnection during a Small-scale Flare in the Partially Ionized Low Solar Atmosphere".The Astrophysical Journal Letters 966.2(2024). |
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来源：云南天文台
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