中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
  4. 中国科学院地球与行星物理重点实验室
Observational evidences of wave excitation and inverse cascade in a distant Earth foreshock region

文献类型：期刊论文

作者He, Jiansen1; Duan, Die1; Zhu, Xingyu1; Yan, Limei2; Wang, Linghua1
刊名SCIENCE CHINA-EARTH SCIENCES
出版日期2019-04-01
卷号62期号:4页码:619-630
关键词Solar wind Foreshock Wave-particle interaction Parametric instability
ISSN号1674-7313
DOI10.1007/s11430-019-9330-3
英文摘要The foreshock with nascent plasma turbulence is regarded as a fascinating region to understand basic plasma physical processes, e.g., wave-particle interactions as well as wave-wave couplings. Although there have been plenty of intensive studies on this topic, some key clues about the physical processes still lack observations. A relatively comprehensive case study with some new observations is presented in this work based on the WIND spacecraft observations. In this case, upstream energetic protons were drifting at tens of Alfven speed with respect to the background plasma protons. When looking at the magnetic wave activities, we find the co-existence of high-frequency (0.1-0.5 Hz) large-amplitude right-hand polarized (RHP) waves and low-frequency (0.02-0.1 Hz) small-amplitude left-hand polarized (LHP) waves in the spacecraft (SC) frame. The observed anticorrelation between magnetic and velocity fluctuations along with the sunward magnetic field direction indicates that the low-frequency LHP waves in the SC frame are in fact the sunward upstream RHP Alfvenic waves in the solar wind frame. This new observation corroborates the applicability of theories about plasma non-resonance instability and inverse cascade to the foreshock region, where the downstream high-frequency RHP parent waves are excited by the upstream energetic protons through non-resonance instability and the low-frequency RHP daughter waves are generated by the parent waves due to nonlinear parametric instability. Furthermore, enhanced downstream energetic proton fluxes are inferred to result from scattering of the upstream protons by the nascent turbulent fluctuations. Therefore, some critical clues about the newborn turbulence in the foreshock are provided in this work.
WOS关键词MODULATIONAL INSTABILITY ; FINITE-AMPLITUDE ; NONLINEAR ALFVEN ; MAGNETIC-FIELD ; UPSTREAM WAVES ; ACCELERATION ; FLUCTUATIONS ; SIMULATION ; EVOLUTION ; SPECTRA
资助项目National Natural Science Foundation of China[41574168] ; National Natural Science Foundation of China[41874200] ; National Natural Science Foundation of China[41674171] ; National Natural Science Foundation of China[41774183] ; National Natural Science Foundation of China[41421003]
WOS研究方向Geology
语种英语
WOS记录号WOS:000462228900002
出版者SCIENCE PRESS
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/91076]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者He, Jiansen
作者单位1.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 He, Jiansen,Duan, Die,Zhu, Xingyu,et al. Observational evidences of wave excitation and inverse cascade in a distant Earth foreshock region[J]. SCIENCE CHINA-EARTH SCIENCES,2019,62(4):619-630.
APA He, Jiansen,Duan, Die,Zhu, Xingyu,Yan, Limei,&Wang, Linghua.(2019).Observational evidences of wave excitation and inverse cascade in a distant Earth foreshock region.SCIENCE CHINA-EARTH SCIENCES,62(4),619-630.
MLA He, Jiansen,et al."Observational evidences of wave excitation and inverse cascade in a distant Earth foreshock region".SCIENCE CHINA-EARTH SCIENCES 62.4(2019):619-630.

入库方式： OAI收割

来源：地质与地球物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。