Coronal magnetic connectivity and EUV dimmings
文献类型：期刊论文
| 作者 | Harra, Louise K.; Zhang, Yuzong ; Wang, Jingxiu; Attrill, Gemma D. R.; Yang, Zhiliang; He, Xiangtao
|
| 刊名 | SOLAR PHYSICS
 |
| 出版日期 | 2007-04-01 |
| 卷号 | 241期号:2页码:329-349 |
| DOI | 10.1007/s11207-007-0229-3 |
| 英文摘要 | Coronal dimming can be considered to be a disk signature of front-side coronal mass ejections (CMEs) (Thompson et al.: 2000, Geophys. Res. Lett. 27, 1431). The study of the magnetic connectivity associated with coronal dimming can shed new light on the magnetic nature of CMEs. In this study, four major flare-CME events on 14 July 2000, 28 October 2003, 7 November 2004, and 15 January 2005 are analyzed. They were all halo CMEs associated with major flare activity in complex active regions (ARs) and produced severe space weather consequences. To explore the magnetic connectivity of these CMEs, global potential-field extrapolations based on the composite synoptic magnetograms from the Michelson Doppler Imager onboard the Solar and Heliospheric Observatory are constructed, and their association with coronal dimming is revealed by the Extreme ultraviolet Imaging Telescope. It is found that each flare-CME event involved interaction of more than ten sets of magnetic-loop systems. These loop systems occupied over 50% of all identified loop systems in the visible hemisphere and covered a wide range of solar longitudes and latitudes. We categorize the loop systems as active-region loops (ARLs), AR-interconnecting loops (ARILs) including transequatorial loops (TLs), and long arcades (LAs) straddling filament channels. A recurring pattern, the saddle-field configuration (SFC), consisting of ARILs, is found to be present in all four major flare-CME events. The magnetic connectivity revealed by this work implies that intercoupling and interaction of multiple flux-loop systems are required for a major CME. For comparison, a simple flare-CME event of 12 May 1997 with a relatively simple magnetic configuration is chosen. Even for this simple flare-CME event, we find that multiple flux-loop systems are also present. |
| 语种 | 英语 |
| WOS记录号 | WOS:000247458200010 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8973]  |
| 专题 | 国家天文台_太阳物理研究部 |
| 作者单位 | 1.UCL, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England 2.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Harra, Louise K.,Zhang, Yuzong,Wang, Jingxiu,et al. Coronal magnetic connectivity and EUV dimmings[J]. SOLAR PHYSICS,2007,241(2):329-349. |
| APA | Harra, Louise K.,Zhang, Yuzong,Wang, Jingxiu,Attrill, Gemma D. R.,Yang, Zhiliang,&He, Xiangtao.(2007).Coronal magnetic connectivity and EUV dimmings.SOLAR PHYSICS,241(2),329-349. |
| MLA | Harra, Louise K.,et al."Coronal magnetic connectivity and EUV dimmings".SOLAR PHYSICS 241.2(2007):329-349. |
入库方式： OAI收割
来源：国家天文台
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