DOI: 10.1002/2017JA024691
Scopus记录号: 2-s2.0-85044094444
论文题名: Nonlinear Wave-Particle Interaction: Implications for Newborn Planetary and Backstreaming Proton Velocity Distribution Functions
作者: Romanelli N. ; Mazelle C. ; Meziane K.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 2 起始页码: 1100
结束页码: 1117
语种: 英语
英文关键词: nonlinear waves
; planetary magnetospheres
; wave-particle interaction
英文摘要: Seen from the solar wind (SW) reference frame, the presence of newborn planetary protons upstream from the Martian and Venusian bow shocks and SW protons reflected from each of them constitutes two sources of nonthermal proton populations. In both cases, the resulting proton velocity distribution function is highly unstable and capable of giving rise to ultralow frequency quasi-monochromatic electromagnetic plasma waves. When these instabilities take place, the resulting nonlinear waves are convected by the SW and interact with nonthermal protons located downstream from the wave generation region (upstream from the bow shock), playing a predominant role in their dynamics. To improve our understanding of these phenomena, we study the interaction between a charged particle and a large-amplitude monochromatic circularly polarized electromagnetic wave propagating parallel to a background magnetic field, from first principles. We determine the number of fix points in velocity space, their stability, and their dependence on different wave-particle parameters. Particularly, we determine the temporal evolution of a charged particle in the pitch angle-gyrophase velocity plane under nominal conditions expected for backstreaming protons in planetary foreshocks and for newborn planetary protons in the upstream regions of Venus and Mars. In addition, the inclusion of wave ellipticity effects provides an explanation for pitch angle distributions of suprathermal protons observed at the Earth's foreshock, reported in previous studies. These analyses constitute a mean to evaluate if nonthermal proton velocity distribution functions observed at these plasma environments present signatures that can be understood in terms of nonlinear wave-particle processes. ©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/114609
Appears in Collections: 气候减缓与适应
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作者单位: Institut de Recherche en Astrophysique et Planétologie, University of Toulouse, CNRS, UPS, CNES, Toulouse, France; Laboratoire Atmosphere, Milieux et Observations Spatiales, IPSL, CNRS, UVSQ, UPMC, Paris, France; Department of Physics, University of New Brunswick, Fredericton, NB, Canada
Recommended Citation:
Romanelli N.,Mazelle C.,Meziane K.. Nonlinear Wave-Particle Interaction: Implications for Newborn Planetary and Backstreaming Proton Velocity Distribution Functions[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(2)