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题名: Reformation of rippled quasi-parallel shocks: 2-D hybrid simulations
作者: Hao, Yufei; Gao, Xinliang; Lu, Quanming; Huang, Can; Wang, Rongsheng; Wang, Shui
作者部门: 空间科学部
通讯作者: Lu, QM (reprint author), Univ Sci & Technol China, Dept Geophys & Planetary Sci, CAS Key Lab Geospace Environm, Hefei, Peoples R China. ; Lu, QM (reprint author), Collaborat Innovat Ctr Astronaut Sci & Technol, Harbin, Peoples R China.
关键词: quasi-parallel shocks ; hybrid simulation ; ripples ; reformation
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
ISSN号: 2169-9380
出版日期: 2017
卷号: 122, 期号:6, 页码:6385-6396
收录类别: SCI
项目资助者: NSFC [41331067, 41527804, 11235009, 41331070, 41421063] ; Key Research Program of Frontier Sciences, CAS [QYZDJ-SSW-DQC010] ; China Postdoctoral Science Foundation [2016M602019] ; Specialized Research Fund for State Key Laboratories
英文摘要: One-dimensional (1-D) hybrid simulations have demonstrated that a quasi-parallel shock is nonstationary and undergoes a reformation process. Recently, two-dimensional (2-D) hybrid simulations have revealed that ripples along the shock front is an inherent property of a quasi-parallel shock. In this paper, we investigate reformation process of a rippled quasi-parallel shock with a 2-D hybrid simulation model. The simulation results show that at a rippled shock, incident particles behave differently and just can be partially reflected at some specific locations along the rippled shock front, and the reflected particles will form an ion beam that moves back to the upstream along the magnetic field. Then, the beam locally interacts with upstream waves, and the waves are enhanced and finally steepen into a new shock front. As the upstream incident plasma moves to the shock front, the new shock front will approach and merge with the old shock front. Such a process occurs only before these locations along the shock front, and after the merging of the new shock front and old shock front is finished, a relatively plane shock front is formed. Subsequently, a new rippled shock front is again generated due to its interaction with the upstream waves, and it will repeat the previous process. In this pattern, the shock reforms itself quasiperiodically, and at the same time, ripples can shift along the shock front. The simulations present a more complete view of reformation for quasi-parallel shocks.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/6015
Appears in Collections:空间科学部_期刊论文

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