DOI: 10.1002/2017JA025066
Scopus记录号: 2-s2.0-85044503972
论文题名: Stimulated Mirror Instability From the Interplay of Anisotropic Protons and Electrons, and their Suprathermal Populations
作者: Shaaban S.M. ; Lazar M. ; Astfalk P. ; Poedts S.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 3 起始页码: 1754
结束页码: 1766
语种: 英语
英文关键词: kinetic instabilities
; magnetosheath plasmas
; numerical calculations
; suprathermal populations
; theoretical modeling
英文摘要: Mirror instability driven by the temperature anisotropy of protons can offer a plausible explanation for the mirror-like fluctuations observed in planetary magnetosheaths. In the present paper we invoke a realistic kinetic approach which can reproduce nonthermal features of plasma particles reported by the observations, i.e., temperature anisotropies and suprathermal populations. Seeking accuracy, a numerical analysis is performed using an advanced code named DSHARK, recently proposed to resolve the linear dispersion and stability for an arbitrary propagation in bi-Kappa distributed electron-proton plasmas. The stimulating effect of the anisotropic bi-Maxwellian electrons reported in Remya et al. (2013, https://doi.org/10.1002/jgra.50091) is markedly enhanced in the presence of suprathermal electrons described by the bi-Kappa distribution functions. The influence of suprathermal protons is more temperate, but overall, present results demonstrate that these sources of free energy provide natural conditions for a stimulated mirror instability, more efficient than predicted before and capable to compete with other instabilities (e.g., the electromagnetic ion-cyclotron instability) and mechanisms of relaxation. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114314
Appears in Collections: 气候减缓与适应
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作者单位: Centre for Mathematical Plasma Astrophysics, KU Leuven, Leuven, Belgium; Theoretical Physics Research Group, Physics Department, Faculty of Science, Mansoura University, Mansoura, Egypt; Institut für Theoretische Physik, Lehrstuhl IV: Weltraum- und Astrophysik, Ruhr-Universität Bochum, Bochum, Germany; Max-Planck Institut für Plasmaphysik, Garching, Germany
Recommended Citation:
Shaaban S.M.,Lazar M.,Astfalk P.,et al. Stimulated Mirror Instability From the Interplay of Anisotropic Protons and Electrons, and their Suprathermal Populations[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(3)