Topology of Magnetic and Velocity Fields at Kinetic Scales in Incompressible Plasma Turbulence

被引：9

作者：

Zhang, J. ^{[1
]}

Huang, S. Y. ^{[1
,2
]}

Sahraoui, F. ^{[3
]}

Andres, N. ^{[4
,5
]}

Yuan, Z. G. ^{[1
]}

Jiang, K. ^{[1
]}

Xu, S. B. ^{[1
]}

Wei, Y. Y. ^{[1
]}

Xiong, Q. Y. ^{[1
]}

Wang, Z. ^{[1
]}

Lin, R. T. ^{[1
]}

Yu, L. ^{[1
]}

机构：

[1] Wuhan Univ, Sch Elect Informat, Wuhan, Peoples R China

[2] Hubei Luojia Lab, Wuhan, Peoples R China

[3] Sorbonne Univ, Paris Saclay Observ Paris Meudon, CNRS Ecole Polytech, Lab Phys Plasmas, Palaiseau, France

[4] UBA, Dept Fis, Fac Ciencias Exactas & Nat, Ciudad Univ, Buenos Aires, Argentina

[5] CONICET UBA, Inst Astron & Fis Espacio, Buenos Aires, Argentina

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2023年 / 128卷 / 01期

基金：

中国国家自然科学基金;

关键词：

GRADIENT TENSOR; SOLAR-WIND; DYNAMICS; INVARIANTS;

D O I：

10.1029/2022JA031064

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The topology of the magnetic and velocity fields at the kinetic scales are investigated in the context of nearly incompressible magnetosheath plasma turbulence. Using the unprecedented high-resolution data from the Magnetospheric MultiScale mission, the joint probability distribution functions of geometrical invariants characterizing the magnetic and velocity fields gradient tensor at the kinetic scales are computed. The topological features of the magnetic and velocity field gradient tensors and their symmetric component tensors present axisymmetric distribution patterns, indicating that the structure of the plasma turbulence at the kinetic scales are different from those in hydrodynamic and magnetohydrodynamic turbulence. Moreover, a strong correlation between the straining and rotational parts of the magnetic and velocity field gradient tensors was found, which manifests the dominance of sheet-like structures at the kinetic-scales dissipation in incompressible plasma turbulence.

引用

页数：9

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