STATISTICAL STUDY OF CORONAL MASS EJECTIONS WITH AND WITHOUT DISTINCT LOW CORONAL SIGNATURES
文献类型：期刊论文
| 作者 | Ma, S.1,2,3; Attrill, G. D. R.1; Golub, L.1; Lin, J.2
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2010-10-10 |
| 卷号 | 722期号:1页码:289-301 |
| 关键词 | Sun: activity Sun: corona Sun: coronal mass ejections (CMEs) Sun: UV radiation |
| 英文摘要 | Taking advantage of the two viewpoints of the STEREO spacecraft, we present a statistical study of coronal mass ejections (CMEs) with and without distinct low coronal signatures (LCSs) from 2009 January 1 to August 31. During this period, the lines of sight from STEREO A and B are almost perpendicular and nearly a quarter of the Sun was observed by both. We identified 34 CMEs that originated from around this area and find that (1) about 1 out of 3 CMEs that were studied during 8 months of solar minimum activity are stealth CMEs; a CME is stealth if no distinct LCS (such as coronal dimming, coronal wave, filament eruption, flare, post-eruptive arcade) can be found on the disk. (2) The speeds of the stealth CMEs without LCSs are typically below 300 km s(-1). Comparing with the slow CMEs with LCSs, the stealth CMEs did not show any clear differences in their velocity and acceleration evolution. (3) The source regions of the stealth CMEs are usually located in the quiet Sun rather than active regions. Detailed study indicates that more than half of the stealth CMEs in this paper showed some faint change of the coronal structures (likely parts of flux ropes) when they could be observed over the solar limb before or during the CME evolution. Finally, we note that space weather detection systems based on LCSs totally independent of coronagraph data may fail to detect a significant proportion of CMEs. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000282908900026 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7679]  |
| 专题 | 国家天文台_太阳物理研究部 |
| 作者单位 | 1.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA 2.Chinese Acad Sci, Natl Astron Observ China, Yunnan Astron Observ, Kunming 650011, Yunnan, Peoples R China 3.CAS, Grad Sch, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, S.,Attrill, G. D. R.,Golub, L.,et al. STATISTICAL STUDY OF CORONAL MASS EJECTIONS WITH AND WITHOUT DISTINCT LOW CORONAL SIGNATURES[J]. ASTROPHYSICAL JOURNAL,2010,722(1):289-301. |
| APA | Ma, S.,Attrill, G. D. R.,Golub, L.,&Lin, J..(2010).STATISTICAL STUDY OF CORONAL MASS EJECTIONS WITH AND WITHOUT DISTINCT LOW CORONAL SIGNATURES.ASTROPHYSICAL JOURNAL,722(1),289-301. |
| MLA | Ma, S.,et al."STATISTICAL STUDY OF CORONAL MASS EJECTIONS WITH AND WITHOUT DISTINCT LOW CORONAL SIGNATURES".ASTROPHYSICAL JOURNAL 722.1(2010):289-301. |
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来源：国家天文台
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