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题名: RADIAL FLOW PATTERN OF A SLOW CORONAL MASS EJECTION
作者: Feng Li(封莉)1, 2; Inhester, Bernd2; Gan WeiQun(甘伟群)1
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2015-06-01
卷号: 805, 期号:2, 页码:113
关键词: hydrodynamics ; Sun: coronal mass ejections (CMEs) ; Sun: evolution
学科分类: 天文和天体物理
DOI: 10.1088/0004-637X/805/2/113
文章类型: Article
英文摘要: Height-time plots of the leading edge of coronal mass ejections (CMEs) have often been used to study CME kinematics. We propose a new method to analyze the CME kinematics in more detail by determining the radial mass transport process throughout the entire CME. Thus, our method is able to estimate not only the speed of the CME front but also the radial flow speed inside the CME. We have applied this method to a slow CME with an average leading edge speed of about 480 km s(-1). In the Lagrangian frame, the speeds of the individual CME mass elements stay almost constant within 2 and 15 R-S, the range over which we analyzed the CME. Hence, we have no evidence of net radial forces acting on parts of the CME in this range or of a pile up of mass ahead of the CME. We find evidence that the leading edge trajectory obtained by tie-pointing may gradually lag behind the Lagrangian front-side trajectories derived from our analysis. Our results also allow a much more precise estimate of the CME energy. Compared with conventional estimates using the CME total mass and leading edge motion, we find that the latter may overestimate the kinetic energy and the gravitational potential energy.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: STEREO
收录类别: SCI
所属项目名称: PMO_LIB-IR
语种: 英语
WOS记录号: WOS:000356715400028
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/14830
Appears in Collections:太阳高能及相关物理过程研究团组_期刊论文

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作者单位: 1.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China
2.Max Planck Inst Sonnensyst Forsch, D-37077 Gottingen, Germany
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