globalchange  > 气候减缓与适应
DOI: 10.1002/2017JA024759
Scopus记录号: 2-s2.0-85040630202
论文题名:
Electromagnetic Electron Cyclotron Instability in the Solar Wind
作者: Lazar M.; Yoon P.H.; López R.A.; Moya P.S.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期:1
起始页码: 6
结束页码: 19
语种: 英语
英文关键词: electromagnetic instabilities ; electron velocity distributions ; PIC simulations ; plasma kinetics ; quasi-linear theory ; solar wind
英文摘要: The abundant reports on the existence of electromagnetic high-frequency fluctuations in space plasmas have increased the expectations that theoretical modeling may help understand their origins and implications (e.g., kinetic instabilities and dissipation). This paper presents an extended quasi-linear approach of the electromagnetic electron cyclotron instability in conditions typical for the solar wind, where the anisotropic electrons (T⊥>T∥) exhibit a dual distribution combining a bi-Maxwellian core and bi-Kappa halo. Involving both the core and halo populations, the instability is triggered by the cumulative effects of these components, mainly depending of their anisotropies. The instability is not very sensitive to the shape of halo distribution function conditioned in this case by the power index κ. This result seems to be a direct consequence of the low density of electron halo, which is assumed more dilute than the core component in conformity with the observations in the ecliptic. Quasi-linear time evolutions predicted by the theory are confirmed by the particle-in-cell simulations, which also suggest possible explanations for the inherent differences determined by theoretical constraints. These results provide premises for an advanced methodology to characterize, realistically, the electromagnetic electron cyclotron instability and its implication in the solar wind. ©2017. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114752
Appears in Collections:气候减缓与适应

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作者单位: Institut für Theoretische Physik, Lehrstuhl IV: Weltraum- und Astrophysik, Ruhr-Universität Bochum, Bochum, Germany; Center for Mathematical Plasma Astrophysics, KU Leuven, Leuven, Belgium; Institute for Physical Science and Technology, University of Maryland, College Park, MD, United States; Korea Astronomy and Space Science Institute, Daejeon, South Korea; School of Space Research, Kyung Hee University, Yongin-Si, South Korea; Departamento de Física, Facultad de Ciencias, Universidad de Chile, Santiago, Chile

Recommended Citation:
Lazar M.,Yoon P.H.,López R.A.,et al. Electromagnetic Electron Cyclotron Instability in the Solar Wind[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(1)
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