Basic properties of magnetohydrodynamic turbulence in the inertial range

被引：40

作者：

Beresnyak, Andrey ^{[1
,2
]}

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[2] Ruhr Univ Bochum, D-44780 Bochum, Germany

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2012年 / 422卷 / 04期

关键词：

MHD; turbulence; STRONG IMBALANCED TURBULENCE; NUMERICAL SIMULATIONS; SCALING LAWS; ALFVENIC TURBULENCE; ANISOTROPY; SPECTRUM; FIELD;

D O I：

10.1111/j.1365-2966.2012.20859.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We revisit the issue of the spectral slope of magnetohydrodynamic (MHD) turbulence in the inertial range and argue that the numerics favour a GoldreichSridhar -5/3 slope rather than a -3/2 slope. We also perform precision measurements of the anisotropy of MHD turbulence and determine the anisotropy constant CA= 0.34 of Alfvenic turbulence. Together with the previously measured Kolmogorov constant CK= 4.2, or 3.3 for a purely Alfvenic case, it constitutes a full description of the MHD cascade in terms of spectral quantities, which is of high practical value for astrophysics.

引用

页码：3495 / 3502

页数：8

共 37 条

[1]

[Anonymous], 1964, Soviet Astronomy

[2] Strong imbalanced turbulence [J].

Beresnyak, A. ;

Lazarian, A. .

ASTROPHYSICAL JOURNAL, 2008, 682 (02) :1070-1075

[3] Polarization intermittency and its influence on MHD turbulence [J].

Beresnyak, A ;

Lazarian, A .

ASTROPHYSICAL JOURNAL, 2006, 640 (02) :L175-L178

[4] Density scaling and anisotropy in supersonic magnetohydrodynamic turbulence [J].

Beresnyak, A ;

Lazarian, A ;

Cho, J .

ASTROPHYSICAL JOURNAL, 2005, 624 (02) :L93-L96

[5] Universal Nonlinear Small-Scale Dynamo [J].

Beresnyak, A. .

PHYSICAL REVIEW LETTERS, 2012, 108 (03)

[6] Spectral Slope and Kolmogorov Constant of MHD Turbulence [J].

Beresnyak, A. .

PHYSICAL REVIEW LETTERS, 2011, 106 (07)

[7] SCALING LAWS AND DIFFUSE LOCALITY OF BALANCED AND IMBALANCED MAGNETOHYDRODYNAMIC TURBULENCE [J].

Beresnyak, A. ;

Lazarian, A. .

ASTROPHYSICAL JOURNAL LETTERS, 2010, 722 (01) :L110-L113

[8] COMPARISON OF SPECTRAL SLOPES OF MAGNETOHYDRODYNAMIC AND HYDRODYNAMIC TURBULENCE AND MEASUREMENTS OF ALIGNMENT EFFECTS [J].

Beresnyak, A. ;

Lazarian, A. .

ASTROPHYSICAL JOURNAL, 2009, 702 (02) :1190-1198

[9] STRUCTURE OF STATIONARY STRONG IMBALANCED TURBULENCE [J].

Beresnyak, A. ;

Lazarian, A. .

ASTROPHYSICAL JOURNAL, 2009, 702 (01) :460-471

[10] Spectrum of magnetohydrodynamic turbulence [J].

Boldyrev, S .

PHYSICAL REVIEW LETTERS, 2006, 96 (11)

← 1 2 3 4 →