NONLINEAR GENERATION OF KINETIC-SCALE WAVES BY MAGNETOHYDRODYNAMIC ALFVEN WAVES AND NONLOCAL SPECTRAL TRANSPORT IN THE SOLAR WIND
文献类型：期刊论文
| 作者 | Zhao, J. S.1,3; Voitenko, Y.2; Wu, D. J.1; De Keyser, J.2 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2014-04-20 |
| 卷号 | 785期号:2页码:0 |
| 关键词 | instabilities plasmas solar wind turbulence waves |
| ISSN号 | 0004-637X |
| 英文摘要 | We study the nonlocal nonlinear coupling and generation of kinetic Alfven waves (KAWs) and kinetic slow waves (KSWs) by magnetohydrodynamic Alfven waves (MHD AWs) in conditions typical for the solar wind in the inner heliosphere. This cross-scale process provides an alternative to the turbulent energy cascade passing through many intermediate scales. The nonlinearities we study are proportional to the scalar products of wave vectors and hence are called "scalar" ones. Despite the strong Landau damping of kinetic waves, we found fast growing KAWs and KSWs at perpendicular wavelengths close to the ion gyroradius. Using the parametric decay formalism, we investigate two independent decay channels for the pump AW: forward decay (involving co-propagating product waves) and backward decay (involving counter-propagating product waves). The growth rate of the forward decay is typically 0.05 but can exceed 0.1 of the pump wave frequency. The resulting spectral transport is nonlocal and anisotropic, sharply increasing perpendicular wavenumbers but not parallel ones. AWs and KAWs propagating against the pump AW grow with about the same rate and contribute to the sunward wave flux in the solar wind. Our results suggest that the nonlocal decay of MHD AWs into KAWs and KSWs is a robust mechanism for the cross-scale spectral transport of the wave energy from MHD to dissipative kinetic scales in the solar wind and similar media. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | POLAR CORONAL HOLE ; MAGNETIC HELICITY ; TURBULENCE ; PLASMA ; ENERGIZATION ; CYCLOTRON ; FLUCTUATIONS ; DISSIPATION ; EXCITATION ; ATMOSPHERE |
| 收录类别 | SCI |
| 原文出处 | 10.1088/0004-637X/785/2/139 |
| 语种 | 英语 |
| WOS记录号 | WOS:000335736800058 |
| 公开日期 | 2014-11-20 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/10646]  |
| 专题 | 紫金山天文台_太阳和太阳系等离子体研究团组 |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, Nanjing, Jiangsu, Peoples R China 2.Belgian Inst Space Aeron, Space Phys Div, Solar Terr Ctr Excellence, B-1180 Brussels, Belgium 3.Chinese Acad Sci, Natl Astron Observ, Lab Solar Act, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, J. S.,Voitenko, Y.,Wu, D. J.,et al. NONLINEAR GENERATION OF KINETIC-SCALE WAVES BY MAGNETOHYDRODYNAMIC ALFVEN WAVES AND NONLOCAL SPECTRAL TRANSPORT IN THE SOLAR WIND[J]. ASTROPHYSICAL JOURNAL,2014,785(2):0. |
| APA | Zhao, J. S.,Voitenko, Y.,Wu, D. J.,&De Keyser, J..(2014).NONLINEAR GENERATION OF KINETIC-SCALE WAVES BY MAGNETOHYDRODYNAMIC ALFVEN WAVES AND NONLOCAL SPECTRAL TRANSPORT IN THE SOLAR WIND.ASTROPHYSICAL JOURNAL,785(2),0. |
| MLA | Zhao, J. S.,et al."NONLINEAR GENERATION OF KINETIC-SCALE WAVES BY MAGNETOHYDRODYNAMIC ALFVEN WAVES AND NONLOCAL SPECTRAL TRANSPORT IN THE SOLAR WIND".ASTROPHYSICAL JOURNAL 785.2(2014):0. |
入库方式： OAI收割
来源：紫金山天文台
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