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题名: Numerical Simulations of Particle Acceleration at Interplanetary Quasi-perpendicular Shocks
作者: Kong, F. -J.; Qin, G.; Zhang, L. -H.
作者部门: 空间科学部
通讯作者: Qin, G (reprint author), Harbin Inst Technol, Sch Sci, Shenzhen 518055, Peoples R China.
关键词: acceleration of particles ; shock waves
刊名: ASTROPHYSICAL JOURNAL
ISSN号: 0004-637X
出版日期: 2017
卷号: 845, 期号:1, 页码:43
收录类别: SCI
项目资助者: [NNSFC 41574172] ; [NNSFC 41374177] ; [NNSFC 41125016]
英文摘要: Using test particle simulations we study particle acceleration at highly perpendicular (theta(Bn) >= 75 degrees) shocks under conditions of modeling magnetic turbulence. We adopt a backward-in-time method to solve the Newton-Lorentz equation using the observed shock parameters for quasi-perpendicular interplanetary shocks, and compare the simulation results with ACE/EPAM observations to obtain the injection energy and timescale of particle acceleration. With our modeling and observations, we find that a large upstream speed is responsible for efficient particle acceleration. Our results also show that the quasi-perpendicular shocks are capable of accelerating thermal particles to high energies of the order of MeV for both kappa and Maxwellian upstream distributions, which may originate from the fact that in our model, the local background magnetic field has a component parallel to the shock normal.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/5994
Appears in Collections:空间科学部_期刊论文

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