The CNE acceleration problem: Error estimates in LASCO coronal mass ejection measurements
文献类型：期刊论文
| 作者 | Wen, Yayuan; Maia, Dalmiro Jorge Filipe; Wang, Jingxiu
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2007-03-10 |
| 卷号 | 657期号:2页码:1117-1126 |
| 关键词 | Sun : activity Sun : corona Sun : coronal mass ejections (CMEs) |
| 英文摘要 | The properties of the coronal mass ejections (CMEs) observed by the Large Angle and Spectrometric Corona-graph Experiment (LASCO) on the Solar and Heliospheric Observatory (SOHO) spacecraft are kept in an online catalog that has been widely used in a series of analyses of individual events and in statistical overviews of CME properties. A subject of some of these studies has been the problem of CME acceleration, in particular the differences between accelerated and decelerated events. The impact of measurement errors in the acceleration is an issue that has been mostly overlooked in such studies. We show in this paper how to obtain error estimates for the height measurements given in the catalog of CMEs observed by LASCO. We find that the error in CME leading-edge position measurements grows rather quickly in the first few solar radii, roughly with the square of the distance from Sun center, but becomes reasonably flat above 5 R., varying approximately as the square root of the distance. Above 5 R. the typical errors in acceleration are of the same order or larger than the accelerations computed from catalog data. Kinematic quantities computed above 5 R. for individual events will mostly reflect the distribution of the errors in the acceleration, and not the true acceleration experienced by the events. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000244928500037 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7245]  |
| 专题 | 国家天文台_太阳物理研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China 2.Univ Porto, Fac Ciencias, Observ Astron Prof Manuel de Barros, CICGE, Vila Nova De Gaia, Portugal |
| 推荐引用方式 GB/T 7714 | Wen, Yayuan,Maia, Dalmiro Jorge Filipe,Wang, Jingxiu. The CNE acceleration problem: Error estimates in LASCO coronal mass ejection measurements[J]. ASTROPHYSICAL JOURNAL,2007,657(2):1117-1126. |
| APA | Wen, Yayuan,Maia, Dalmiro Jorge Filipe,&Wang, Jingxiu.(2007).The CNE acceleration problem: Error estimates in LASCO coronal mass ejection measurements.ASTROPHYSICAL JOURNAL,657(2),1117-1126. |
| MLA | Wen, Yayuan,et al."The CNE acceleration problem: Error estimates in LASCO coronal mass ejection measurements".ASTROPHYSICAL JOURNAL 657.2(2007):1117-1126. |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。