Particle Acceleration in the Outflow Region of Magnetic Reconnection on Solar Flare Loop-tops
文献类型：期刊论文
| 作者 | Li Y(李燕)1,2; Ni L(倪蕾)1,2; Ye J(叶景)1,2,3; Mei ZX(梅志星)1,2 |
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| 出版日期 | 2025-10-01 |
| 卷号 | 25期号:10 |
| 关键词 | Sun: flares Sun: particle emission magnetohydrodynamics (MHD) magnetic reconnection acceleration of particles |
| ISSN号 | 1674-4527 |
| DOI | 10.1088/1674-4527/adf9a2 |
| 产权排序 | 第1完成单位 |
| 文献子类 | Article |
| 英文摘要 | The origin of high-energy particles that generate non-thermal emission at the loop-tops of flare remains unclear. The loop-top regions of flares, which can be reached by outflows generated by magnetic reconnection, are prime candidate regions for the production of high-energy particles. In this work, we study particle acceleration within these regions by combining magnetohydrodynamics and test particle models. We focused on investigating the dynamic characteristics of particles in the two magnetic field configurations with and without a magnetic trap. In one case, the magnetic field contains a downward-concave structure formed by the collision of rapid reconnection outflows with closed magnetic loops, this structure is capable of confining particles for an extended period. Under the influence of the complex electromagnetic field distribution, the particles undergo multiple stochastic acceleration and deceleration processes. Ultimately, a small fraction of particles gain very high energies, while most particles exhibit only modest energy gains. We also observe two distinct particle distribution characteristics: the vast majority of particles are confined within the magnetic trap, with only a small number escaping from this region along open magnetic fields. Notably, the sharp bending of magnetic field lines at the exit of the magnetic trap triggers the aggregation of some particles. In the other case, the magnetic field in the reconnection outflow region does not include the magnetic concave structure, particles are difficult to capture and can quickly leave the outflow area along an open magnetic field. Regardless of the presence or absence of a concave structure, the energy spectra consistently exhibit the power-law distribution. |
| 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 | GAMMA-RAY ; ELECTRON ACCELERATION ; TERMINATION SHOCK ; CURRENT SHEETS ; ISLANDS ; EMISSION ; IMAGES ; PHASE |
| 资助项目 | Strategic Priority Research Program of the Chinese Academy of Sciences[XDB0560000]; National Key R&D Program of China[2022YFF0503800]; NSFC[12373060]; NSFC[12073073]; NSFC[42274216]; NSFC[11933009]; NSFC[12273107]; Yunling Scholar Project of Yunnan Province; 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:001567089900001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | Strategic Priority Research Program of the Chinese Academy of Sciences[XDB0560000] ; National Key R&D Program of China[2022YFF0503800] ; NSFC[12373060, 12073073, 42274216, 11933009, 12273107] ; Yunling Scholar Project of Yunnan Province ; Yunnan Key Laboratory of Solar Physics and Space Science[202205AG070009] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28574]  |
| 专题 | 云南天文台_太阳物理研究组 |
| 通讯作者 | Li Y(李燕) |
| 作者单位 | 1.Yunnan Key Laboratory of Solar Physics and Space Science, Kunming 650216, China; 2.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China; 3.Yunnan Province China-Malaysia HF-VHF Advanced Radio Astronomy Technology International Joint Laboratory, Kunming 650216, China |
| 推荐引用方式 GB/T 7714 | Li Y,Ni L,Ye J,et al. Particle Acceleration in the Outflow Region of Magnetic Reconnection on Solar Flare Loop-tops[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2025,25(10). |
| APA | 李燕,倪蕾,叶景,&梅志星.(2025).Particle Acceleration in the Outflow Region of Magnetic Reconnection on Solar Flare Loop-tops.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,25(10). |
| MLA | 李燕,et al."Particle Acceleration in the Outflow Region of Magnetic Reconnection on Solar Flare Loop-tops".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 25.10(2025). |
入库方式： OAI收割
来源：云南天文台
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