Coronal magnetic topology and the production of solar impulsive energetic electrons
文献类型：期刊论文
| 作者 | Li, C.1,2 ; Sun, L. P.1; Wang, X. Y.2,3; Dai, Y.1,2
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| 刊名 | ASTRONOMY & ASTROPHYSICS
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| 出版日期 | 2013-08-01 |
| 卷号 | 556 |
| 关键词 | acceleration of particles Sun: magnetic topology Sun: flares Sun: coronal mass ejections |
| 英文摘要 | We investigate two candidate solar sources or active regions (ARs) in association with a solar impulsive energetic electron (SIEE) event on 2002 October 20. The solar particle release (SPR) times of SIEEs are derived by using their velocity dispersion with consideration of the instrumental effect. It is found that there are double electron injections at the Sun. The low-energy (less than or similar to 13 keV) electron injection coincides with a C6.6 flare in AR10154 and is accompanied with prominent type III radio bursts rather than a stronger M1.8 flare in AR10160. The M1.8 flare produces, however, faint type III radio bursts. Electrons of similar to 25 to similar to 300 keV are released similar to 9 min later when a jet-like CME travels to similar to 2.6 solar radii. We further examine the coronal magnetic configurations above the two ARs based on the potential field source surface (PFSS) model. It is found that open field lines, rooted in AR10154 and well connected to the Earth, provide escaping channels for energetic electrons. Only a small portion of magnetic fields are opened above AR10160, being responsible for the faint type III radio bursts. These lines are, however, not well connected, making it impossible for SIEEs detection by near-Earth spacecraft. The results appear to establish a physical link between coronal magnetic topology, formation of type III radio bursts, and production of SIEEs. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000323893500159 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5825]  |
| 专题 | 国家天文台_射电天文研究部 |
| 作者单位 | 1.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China 2.Nanjing Univ, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing 210093, Jiangsu, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Activ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, C.,Sun, L. P.,Wang, X. Y.,et al. Coronal magnetic topology and the production of solar impulsive energetic electrons[J]. ASTRONOMY & ASTROPHYSICS,2013,556. |
| APA | Li, C.,Sun, L. P.,Wang, X. Y.,&Dai, Y..(2013).Coronal magnetic topology and the production of solar impulsive energetic electrons.ASTRONOMY & ASTROPHYSICS,556. |
| MLA | Li, C.,et al."Coronal magnetic topology and the production of solar impulsive energetic electrons".ASTRONOMY & ASTROPHYSICS 556(2013). |
入库方式： OAI收割
来源：国家天文台
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