INTERMITTENT HEATING IN SOLAR WIND AND KINETIC SIMULATIONS

被引：131

作者：

Wu, P. ^{[1
]}

Perri, S. ^{[2
]}

Osman, K. ^{[3
]}

Wan, M. ^{[1
]}

Matthaeus, W. H. ^{[1
]}

Shay, M. A. ^{[1
]}

Goldstein, M. L. ^{[4
]}

Karimabadi, H. ^{[5
]}

Chapman, S. ^{[3
]}

机构：

[1] Univ Delaware, Dept Phys & Astron, Bartol Res Inst, Newark, DE 19716 USA

[2] Univ Calabria, Dipartimento Fis, I-87036 Cosenza, Italy

[3] Univ Warwick, Ctr Fus Space & Astrophys, Coventry CV4 7AL, W Midlands, England

[4] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[5] Univ Calif San Diego, La Jolla, CA 92093 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2013年 / 763卷 / 02期

基金：

美国国家科学基金会; 英国工程与自然科学研究理事会;

关键词：

magnetohydrodynamics (MHD); solar wind; Sun: corona; turbulence; TURBULENCE; DISCONTINUITIES;

D O I：

10.1088/2041-8205/763/2/L30

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Low-density astrophysical plasmas may be described by magnetohydrodynamics at large scales, but require kinetic description at ion scales in order to include dissipative processes that terminate the cascade. Here kinetic plasma simulations and high-resolution spacecraft observations are compared to facilitate the interpretation of signatures of various dissipation mechanisms. Kurtosis of increments indicates that kinetic scale coherent structures are present, with some suggestion of incoherent activity near ion scales. Conditioned proton temperature distributions suggest heating associated with coherent structures. The results reinforce the association of intermittent turbulence, coherent structures, and plasma dissipation.

引用

页数：5

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