The Formation and Eruption of a Sigmoidal Filament Driven by Rotating Network Magnetic Fields
文献类型：期刊论文
| 作者 | Dai,Jun2,3; Ji,Haisheng2,3; Li,Leping1,4 ; Zhang,Jun1,4; Chen,Huadong1,4
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| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2021 |
| 卷号 | 906期号:2 |
| 关键词 | Solar chromosphere Solar filaments Solar magnetic fields Solar rotation Quiescent solar prominence Solar activity Solar filament eruptions |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/abcaf4 |
| 英文摘要 | Abstract We present the formation and eruption of a sigmoidal filament driven by rotating network magnetic fields (RNFs) near the center of the solar disk, which was observed by the 1 m aperture New Vacuum Solar Telescope at the Fuxian Solar Observatory on 2018 July 12. Counterclockwise RNFs twist two small-scale filaments at their northeastern foot-point region, giving a rotation of nearly 200° within about 140 minutes. The motion of the RNF has a tendency to accelerate at first and then decelerate obviously, as the average rotation speed increased from 10 to 150° hr?1, and then slowed down to 50° hr?1. Coalescence then occurs between filaments F1 and F2. Meanwhile the fine structures in the southwestern region of the filament was involved in another interaction of coalescence. The subsequent EUV brightening due to plasma heating is observed in the two interaction regions. These interacting structures, including F1, F2 and the fine structures in the southwestern region, eventually evolve into a larger-scale sigmoidal filament twisted in the same direction as the RNFs gave. The twist of the sigmoidal filament has exceeded 4π and the filament finally erupted. The motion of the sigmoidal filament remains uniform until a nearby jet collides, causing the filament to erupt faster. These results provide evidence that RNF plays an important role in the formation and eruption of the sigmoidal filament. The phenomena also suggests that the kink instability is the trigger mechanism for the filament eruption. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-906-2-ABCAF4 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/57909]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China 2.School of Astronomy and Space Science, University of Science and Technology of China, Hefei, 230026, People's Republic of China 3.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, CAS, Nanjing, 210008, People's Republic of China 4.University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Dai,Jun,Ji,Haisheng,Li,Leping,et al. The Formation and Eruption of a Sigmoidal Filament Driven by Rotating Network Magnetic Fields[J]. The Astrophysical Journal,2021,906(2). |
| APA | Dai,Jun,Ji,Haisheng,Li,Leping,Zhang,Jun,&Chen,Huadong.(2021).The Formation and Eruption of a Sigmoidal Filament Driven by Rotating Network Magnetic Fields.The Astrophysical Journal,906(2). |
| MLA | Dai,Jun,et al."The Formation and Eruption of a Sigmoidal Filament Driven by Rotating Network Magnetic Fields".The Astrophysical Journal 906.2(2021). |
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来源：国家天文台
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