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题名: Kinetic Alfven turbulence below and above ion cyclotron frequency
作者: Zhao, J. S.1, 2; Voitenko, Y. M.3; Wu, D. J.1; Yu, M. Y.4, 5, 6
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
出版日期: 2016
卷号: 121, 期号:1, 页码:5-18
关键词: MHD ; turbulence ; Sun: corona ; solar wind
DOI: 10.1002/2015JA021959
文章类型: Article
英文摘要: Alfvenic turbulent cascade perpendicular and parallel to the background magnetic field is studied accounting for anisotropic dispersive effects and turbulent intermittency. The perpendicular dispersion and intermittency make the perpendicular-wave-number magnetic spectra steeper and speed up production of high ion cyclotron frequencies by the turbulent cascade. On the contrary, the parallel dispersion makes the spectra flatter and decelerate the frequency cascade above the ion cyclotron frequency. Competition of these factors results in spectral indices distributed in the interval [-2, -3], where -2 is the index of high-frequency space-filling turbulence and -3 is the index of low-frequency intermittent turbulence formed by tube-like fluctuations. Spectra of fully intermittent turbulence fill a narrower range of spectral indices [-7/3, -3], which almost coincides with the range of indexes measured in the solar wind. This suggests that the kinetic-scale turbulent spectra are mainly shaped by the dispersion and intermittency. A small mismatch with measured indexes of about 0.1 can be associated with damping effects not studied here.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: SOLAR-WIND TURBULENCE ; 1 AU ; PLASMA TURBULENCE ; ACCRETION FLOWS ; WAVES ; SCALES ; RANGE ; EXCITATION ; CLUSTER
收录类别: SCI
项目资助者: Belgian Federal Science Policy Office via Solar-Terrestrial Centre of Excellence (project Fundamental Science) ; Belgian Federal Science Policy Office via IAP Programme(P7/08 CHARM) ; European Commission(313038 STORM) ; NNSFC(11303099 ; MoSTC(2011CB811402) ; NSF of Jiangsu Province(BK2012495) ; Key Laboratory of Solar Activity at CAS NAO(LSA201304) ; Youth Innovation Promotion Association CAS ; CAEP ; ITER-CN(2013GB104004) ; 11373070 ; 11374262 ; 41074107 ; 41531071)
语种: 英语
WOS记录号: WOS:000371146900001
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内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16153
Appears in Collections:太阳和太阳系等离子体研究团组_期刊论文

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作者单位: 1.Chinese Acad Sci, Purple Mt Observ, Key Lab Planetary Sci, Nanjing, Jiangsu, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing, Peoples R China
3.Belgian Inst Space Aeron, Space Phys Div, Solar Terr Ctr Excellence, Brussels, Belgium
4.Zhejiang Univ, Inst Fus Theory & Simulat, Hangzhou 310003, Zhejiang, Peoples R China
5.Zhejiang Univ, Dept Phys, Hangzhou 310003, Zhejiang, Peoples R China
6.Ruhr Univ Bochum, Inst Theoret Phys 1, Univ Str 150, Bochum, Germany
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