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A Study of External Magnetic Reconnection that Triggers a Solar Eruption
文献类型：期刊论文
| 作者 | Zhou, G. P.2; Zhang, J.3; Wang, J. X.2; Wheatland, M. S.1 |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2017-12-10 |
| 卷号 | 851期号:1页码:8 |
| ISSN号 | 2041-8205 |
| 关键词 | Sun: activity Sun: atmosphere Sun: evolution Sun: filaments, prominences |
| DOI | 10.3847/2041-8213/aa9c40 |
| 英文摘要 | External magnetic reconnection (EMR) is suggested to play an essential role in triggering a solar eruption, but is rarely directly observed. Here, we report on a filament eruption on 2014 October 3 that apparently involves the process of an early EMR. A total of 1.7. x. 10(20) Mx lux first canceled along the filament-related polarity inversion line over 12 hr, and then the filament axis started to brighten in extreme ultraviolet (EUV). An impulsive EUV brightening began 30 minutes later, and we attribute this to EMR, as it is located at the center of a bidirectional outflow with a velocity of 60-75 km s(-1) along large-scale magnetic loops from active regions NOAA 12178 and 12179, respectively, and over the filament mentioned above. Following the EMR, the filament was activated; then, partial eruption occurred 6 minutes later in the west, in which the decay index above the magnetic flux rope (MFR) reached the critical value of 1.5. The observations are interpreted in terms of underlying magnetic flux cancelation leading to the buildup and eventual formation of the MFR with a filament embedded in it, and the MFR is elevated later. The activated MFR rises and pushes the overlying sheared field and forms a current sheet causing the EMR. The EMR in turn weakens the constraining effect of the overlying field, leading to the arising of the MFR, and subsequently erupting due to torus instability. |
| WOS关键词 | CORONAL MASS EJECTIONS ; ACTIVE-REGION ; NUMERICAL SIMULATIONS ; FLUX TUBES ; FLARES ; FIELDS ; CANCELLATION ; PROMINENCES ; MODEL ; EMERGENCE |
| 资助项目 | National Natural Science Foundation of China[11322329] ; National Natural Science Foundation of China[11533008] ; National Natural Science Foundation of China[11573038] ; Chinese Academy of Science Project[KJCX2-EW-T07] ; NSF[AGS-1156120] ; NSF[AGS-1249270] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000417542100001 |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science Project ; Chinese Academy of Science Project ; NSF ; NSF ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science Project ; Chinese Academy of Science Project ; NSF ; NSF ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science Project ; Chinese Academy of Science Project ; NSF ; NSF ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Science Project ; Chinese Academy of Science Project ; NSF ; NSF |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/37338]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Zhou, G. P. |
| 作者单位 | 1.Univ Sydney, Sydney Inst Astron, Sch Phys, Sydney, NSW, Australia 2.Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China 3.George Mason Univ, Dept Phys & Astron, Fairfax, VA 22030 USA |
| 推荐引用方式 GB/T 7714 | Zhou, G. P.,Zhang, J.,Wang, J. X.,et al. A Study of External Magnetic Reconnection that Triggers a Solar Eruption[J]. ASTROPHYSICAL JOURNAL LETTERS,2017,851(1):8. |
| APA | Zhou, G. P.,Zhang, J.,Wang, J. X.,&Wheatland, M. S..(2017).A Study of External Magnetic Reconnection that Triggers a Solar Eruption.ASTROPHYSICAL JOURNAL LETTERS,851(1),8. |
| MLA | Zhou, G. P.,et al."A Study of External Magnetic Reconnection that Triggers a Solar Eruption".ASTROPHYSICAL JOURNAL LETTERS 851.1(2017):8. |
入库方式： OAI收割
来源：国家天文台
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