Magnetic Reconnection Invoked by Sweeping of the CME-driven Fast-mode Shock
文献类型：期刊论文
| 作者 | Zhou,Guiping3,4 ; Gao,Guannan5; Wang,Jingxiu3,4; Lin,Jun1,4,5; Su,Yingna2,6; Jin,Chunlan3,4; Zhang,Yuzong3
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| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2020-12-01 |
| 卷号 | 905期号:2 |
| ISSN号 | 0004-637X |
| 关键词 | Solar magnetic reconnection Solar magnetic fields Solar coronal waves Solar activity Solar flares |
| DOI | 10.3847/1538-4357/abc5b2 |
| 英文摘要 | Abstract Coronal waves exist ubiquitously in the solar atmosphere. They are important not only because of their rich physics but also because they are essential candidates for triggering remote magnetic eruptions. However, the latter mechanism has never been directly confirmed. By revisiting the successive eruptions on 2012 March 7, fast-mode shocks are identified to account for the X5.4 flare-related Extreme UltraViolet wave with a velocity of 550 km s?1, and appeared faster than 2060?±?270 km s?1 at the front of the corresponding coronal mass ejection in the slow-rising phase. They not only propagated much faster than the local Alfvén speed of about 260 km s?1, but also were simultaneously accompanied by a type II radio burst, i.e., a typical feature of a shock wave. The observations show that the shock wave disturbs the coronal loops C1 connecting active regions (ARs) 11429 and 11430, which neighbor a null point region. Following a 40 minute oscillation, an external magnetic reconnection (EMR) occurred in the null point region. About 10 minutes later, a large-scale magnetic flux rope overlaid by C1 became unstable and erupted quickly. It is thought that the fast-mode shock triggered EMR in the null point region and caused the subsequent eruptions. This scenario is directly observed for the first time, and provides new hints for understanding the physics of solar activities and eruptions. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-905-2-ABC5B2 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/61372]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Zhou,Guiping |
| 作者单位 | 1.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100012, People's Republic of China 2.School of Astronomy and Space Science, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China 3.CAS Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China; gpzhou@nao.cas.cn 4.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China 5.Yunnan Observatories, Chinese Academy of Sciences, Kunming, Yunnan 650216, People's Republic of China 6.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Zhou,Guiping,Gao,Guannan,Wang,Jingxiu,et al. Magnetic Reconnection Invoked by Sweeping of the CME-driven Fast-mode Shock[J]. The Astrophysical Journal,2020,905(2). |
| APA | Zhou,Guiping.,Gao,Guannan.,Wang,Jingxiu.,Lin,Jun.,Su,Yingna.,...&Zhang,Yuzong.(2020).Magnetic Reconnection Invoked by Sweeping of the CME-driven Fast-mode Shock.The Astrophysical Journal,905(2). |
| MLA | Zhou,Guiping,et al."Magnetic Reconnection Invoked by Sweeping of the CME-driven Fast-mode Shock".The Astrophysical Journal 905.2(2020). |
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来源：国家天文台
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