Scaling Laws of Turbulence and Heating of Fast Solar Wind: The Role of Density Fluctuations

被引:101
作者
Carbone, V. [1 ,2 ]
Marino, R. [1 ,3 ]
Sorriso-Valvo, L. [2 ]
Noullez, A. [3 ]
Bruno, R. [4 ]
机构
[1] Univ Calabria, Dipartimento Fis, I-87036 Arcavacata Di Rende, CS, Italy
[2] INFM, CNR, Liquid Crystal Lab, I-87036 Arcavacata Di Rende, CS, Italy
[3] Univ Nice Sophia Antipolis, CNRS, Observ Cote Azur, F-06304 Nice, France
[4] INAF, Ist Fis Spazio Interplanetario, Rome, Italy
关键词
INCOMPRESSIBLE MAGNETOHYDRODYNAMICS; ALFVEN WAVES; MHD; DISSIPATION; CASCADE; PLASMA; FLUIDS;
D O I
10.1103/PhysRevLett.103.061102
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Incompressible and isotropic magnetohydrodynamic turbulence in plasmas can be described by an exact relation for the energy flux through the scales. This Yaglom-like scaling law has been recently observed in the solar wind above the solar poles observed by the Ulysses spacecraft, where the turbulence is in an Alfveacutenic state. An analogous phenomenological scaling law, suitably modified to take into account compressible fluctuations, is observed more frequently in the same data set. Large-scale density fluctuations, despite their low amplitude, thus play a crucial role in the basic scaling properties of turbulence. The turbulent cascade rate in the compressive case can, moreover, supply the energy dissipation needed to account for the local heating of the nonadiabatic solar wind.
引用
收藏
页数:4
相关论文
共 32 条
[1]  
[Anonymous], 1972, CORONAL EXPANSION SO
[2]   DENSITY-FLUCTUATIONS AND TURBULENT MACH NUMBERS IN THE INNER SOLAR-WIND [J].
BAVASSANO, B ;
BRUNO, R .
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1995, 100 (A6) :9475-9480
[3]   LARGE-AMPLITUDE ALFVEN WAVES IN INTERPLANETARY MEDIUM .2. [J].
BELCHER, JW ;
DAVIS, L .
JOURNAL OF GEOPHYSICAL RESEARCH, 1971, 76 (16) :3534-+
[4]   Dominant two-dimensional solar wind turbulence with implications for cosmic ray transport [J].
Bieber, JW ;
Wanner, W ;
Matthaeus, WH .
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1996, 101 (A2) :2511-2522
[5]   EVIDENCE FOR LONG PERIOD ALFVEN WAVES IN THE INNER SOLAR-SYSTEM [J].
BRUNO, R ;
BAVASSANO, B ;
VILLANTE, U .
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1985, 90 (NA5) :4373-4377
[6]   The Solar Wind as a Turbulence Laboratory [J].
Bruno, Roberto ;
Carbone, Vincenzo .
LIVING REVIEWS IN SOLAR PHYSICS, 2013, 10 (02) :7-+
[7]   Compressible sub-Alfvenic MHD turbulence in low-β plasmas -: art. no. 245001 [J].
Cho, JY ;
Lazarian, A .
PHYSICAL REVIEW LETTERS, 2002, 88 (24) :4
[8]   Can high-order moments be meaningfully estimated from experimental turbulence measurements [J].
Dudok De Wit, T. .
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 2004, 70 (5 2) :055302-1
[9]   FULLY-DEVELOPED ANISOTROPIC HYDROMAGNETIC TURBULENCE IN INTER-PLANETARY SPACE [J].
DOBROWOLNY, M ;
MANGENEY, A ;
VELTRI, P .
PHYSICAL REVIEW LETTERS, 1980, 45 (02) :144-147
[10]   TOWARD A THEORY OF INTERSTELLAR TURBULENCE .2. STRONG ALFVENIC TURBULENCE [J].
GOLDREICH, P ;
SRIDHAR, S .
ASTROPHYSICAL JOURNAL, 1995, 438 (02) :763-775