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题名: Propagation and Interaction Properties of Successive Coronal Mass Ejections in Relation to a Complex Type II Radio Burst
作者: Liu, Ying D.; Zhao, Xiaowei; Zhu, Bei
作者部门: 空间科学部
通讯作者: Liu, YD (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China. ; Liu, YD (reprint author), Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
关键词: shock waves ; solar-terrestrial relations ; solar wind ; Sun: coronal mass ejections (CMEs) ; Sun: radio radiation
刊名: ASTROPHYSICAL JOURNAL
ISSN号: 0004-637X
出版日期: 2017
卷号: 849, 期号:2, 页码:112
收录类别: SCI
项目资助者: NSFC [41374173, 41774179] ; Specialized Research Fund for State Key Laboratories of China
英文摘要: We examine the propagation and interaction properties of three successive coronal mass ejections (CMEs) from 2001 November 21-22, with a focus on their connection with the behaviors of the associated long-duration complex type II radio burst. In combination with coronagraph and multi-point in situ observations, the long-duration type II burst provides key features for resolving the propagation and interaction complexities of the three CMEs. The two CMEs from November 22 interacted first and then overtook the November 21 CME at a distance of about 0.85 au from the Sun. The timescale for the shock originally driven by the last CME to propagate through the preceding two CMEs is estimated to be about 14 and 6 hr, respectively. We present a simple analytical model without any free parameters to characterize the whole Sun-to-Earth propagation of the shock, which shows a remarkable consistency with all the available data and MHD simulations even out to the distance of Ulysses (2.34 au). The coordination of in situ measurements at the Earth and Ulysses, which were separated by about 71 degrees.4 in latitude, gives important clues for the understanding of shock structure and the interpretation of in situ signatures. The results also indicate a means by which to increase geo-effectiveness with multiple CMEs, which can be considered as another manifestation of the "perfect storm" scenario proposed by Liu et al., although the current case is not "super" in the same sense as the 2012 July 23 event.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/6070
Appears in Collections:空间科学部_期刊论文

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