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题名: Correlation between Angular Widths of CMEs and Characteristics of Their Source Regions
作者: Zhao, X. H.; Feng, X. S.; Feng, H. Q.; Li, Z.
作者部门: 空间科学部
通讯作者: Zhao, XH (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China. ; Zhao, XH (reprint author), HIT Inst Space Sci & Appl Technol, Shenzhen 518055, Peoples R China.
关键词: solar-terrestrial relations ; Sun: coronal mass ejections (CMEs) ; Sun: flares ; sunspots
刊名: ASTROPHYSICAL JOURNAL
ISSN号: 0004-637X
出版日期: 2017
卷号: 849, 期号:1, 页码:79
收录类别: SCI
项目资助者: National Natural Science Foundation of China [41231068, 41474153, 41531073, 41374176, 41731067, 41274179, 41674170] ; Youth Innovation Promotion Association CAS [2016133] ; Natural Science Foundation of Jiangsu Province [BK20140994] ; German Space Agency DLR ; European Union ; U.S. Naval Research Laboratory, Washington
英文摘要: The angular width of a coronal mass ejection (CME) is an important factor in determining whether the corresponding interplanetary CME (ICME) and its preceding shock will reach Earth. However, there have been very few studies of the decisive factors of the CME's angular width. In this study, we use the three-dimensional (3D) angular width of CMEs obtained from the Graduated Cylindrical Shell model based on observations of Solar Terrestrial Relations Observatory (STEREO) to study the relations between the CME's 3D width and characteristics of the CME's source region. We find that for the CMEs produced by active regions (ARs), the CME width has some correlations with the AR's area and flux, but these correlations are not strong. The magnetic flux contained in the CME seems to come from only part of the AR's total flux. For the CMEs produced by flare regions, the correlations between the CME angular width and the flare region's area and flux are strong. The magnetic flux within those CMEs seems to come from the whole flare region or even from a larger region than the flare. Our findings show that the CME's 3D angular width can be generally estimated based on observations of Solar Dynamics Observatory for the CME's source region instead of the observations from coronagraphs on board the Solar and Heliospheric Observatory and STEREO if the two foot points of the CME stay in the same places with no expansion of the CME in the transverse direction until reaching Earth.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/6066
Appears in Collections:空间科学部_期刊论文

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