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DOI | 10.1002/2017GL074026 |
Electron-acoustic solitons and double layers in the inner magnetosphere | |
Vasko, I. Y.1; Agapitov, O. V.1,2; Mozer, F. S.1; Bonnell, J. W.1; Artemyev, A. V.3,4; Krasnoselskikh, V. V.5; Reeves, G.6; Hospodarsky, G.7 | |
2017-05-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:10 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Ukraine; Russia; France |
英文摘要 | The Van Allen Probes observe generally two types of electrostatic solitary waves (ESW) contributing to the broadband electrostatic wave activity in the nightside inner magnetosphere. ESW with symmetric bipolar parallel electric field are electron phase space holes. The nature of ESW with asymmetric bipolar (and almost unipolar) parallel electric field has remained puzzling. To address their nature, we consider a particular event observed by Van Allen Probes to argue that during the broadband wave activity electrons with energy above 200 eV provide the dominant contribution to the total electron density, while the density of cold electrons (below a few eV) is less than a few tenths of the total electron density. We show that velocities of the asymmetric ESW are close to velocity of electron-acoustic waves (existing due to the presence of cold and hot electrons) and follow the Korteweg-de Vries (KdV) dispersion relation derived for the observed plasma conditions (electron energy spectrum is a power law between about 100 eV and 10 keV and Maxwellian above 10 keV). The ESW spatial scales are in general agreement with the KdV theory. We interpret the asymmetric ESW in terms of electron-acoustic solitons and double layers (shocks waves). |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404131900024 |
WOS关键词 | OUTER RADIATION BELT ; SOLITARY WAVES ; AURORAL PLASMA ; GENERATION ; MAGNETOTAIL ; MODE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27543 |
专题 | 气候变化 |
作者单位 | 1.Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA; 2.Taras Shevchenko Natl Univ Kiev, Astron & Space Phys Dept, Kiev, Ukraine; 3.Univ Calif Los Angeles, Inst Geophys & Planetary Sci, Los Angeles, CA 90024 USA; 4.Russian Acad Sci, Space Res Inst, Moscow, Russia; 5.Univ Orleans, LPC2E, Orleans, France; 6.Los Alamos Natl Lab, Santa Fe, NM USA; 7.Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA |
推荐引用方式 GB/T 7714 | Vasko, I. Y.,Agapitov, O. V.,Mozer, F. S.,et al. Electron-acoustic solitons and double layers in the inner magnetosphere[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(10). |
APA | Vasko, I. Y..,Agapitov, O. V..,Mozer, F. S..,Bonnell, J. W..,Artemyev, A. V..,...&Hospodarsky, G..(2017).Electron-acoustic solitons and double layers in the inner magnetosphere.GEOPHYSICAL RESEARCH LETTERS,44(10). |
MLA | Vasko, I. Y.,et al."Electron-acoustic solitons and double layers in the inner magnetosphere".GEOPHYSICAL RESEARCH LETTERS 44.10(2017). |
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