IDENTIFICATION OF KINETIC ALFVEN WAVE TURBULENCE IN THE SOLAR WIND

被引：251

作者：

Salem, C. S. ^{[1
]}

Howes, G. G. ^{[2
]}

Sundkvist, D. ^{[1
]}

Bale, S. D. ^{[1
,3
]}

Chaston, C. C. ^{[1
]}

Chen, C. H. K. ^{[1
]}

Mozer, F. S. ^{[1
]}

机构：

[1] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

[2] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA

[3] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2012年 / 745卷 / 01期

基金：

美国国家科学基金会;

关键词：

interplanetary medium; methods: data analysis; plasmas; solar wind; turbulence; waves; WEAKLY COLLISIONAL PLASMAS; MEAN MAGNETIC-FIELD; ASTROPHYSICAL GYROKINETICS; DISSIPATION RANGE; CLUSTER MISSION; ELECTRIC-FIELD; LINEAR-THEORY; DEPENDENCE; HELICITY; SPECTRUM;

D O I：

10.1088/2041-8205/745/1/L9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The nature of small-scale turbulent fluctuations in the solar wind is investigated using a comparison of Cluster magnetic and electric field measurements to predictions arising from models consisting of either kinetic Alfven waves or whistler waves. The electric and magnetic field properties of these waves from linear theory are used to construct spacecraft-frame frequency spectra of (|delta E|/|delta B|)(s/c) and (|delta B-parallel to|/|delta B|)(s/c), allowing for a direct comparison to spacecraft data. The measured properties of the small-scale turbulent fluctuations, found to be inconsistent with the whistler wave model, agree well with the prediction of a spectrum of kinetic Alfven waves with nearly perpendicular wavevectors.

引用

页数：5

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