Characterizing current structures in 3D hybrid-kinetic simulations of plasma turbulence

被引:7
|
作者
Sisti, M. [1 ,2 ]
Fadanelli, S. [2 ]
Cerri, S. S. [3 ]
Faganello, M. [1 ]
Califano, F. [2 ]
Agullo, O. [1 ]
机构
[1] Aix Marseille Univ, CNRS, PIIM UMR 7345, Marseille, France
[2] Univ Pisa, Dipartimento Fis, Pisa, Italy
[3] Princeton Univ, Dept Astrophys Sci, 4 Ivy Lane, Princeton, NJ 08544 USA
基金
欧盟地平线“2020”;
关键词
methods; data analysis; statistical; numerical; turbulence; COHERENT STRUCTURE FORMATION; MAGNETIC RECONNECTION; DIMENSIONALITY;
D O I
10.1051/0004-6361/202141902
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Context. In space and astrophysical plasmas, turbulence leads to the development of coherent structures characterized by a strong current density and important magnetic shears. Aims. Using hybrid-kinetic simulations of turbulence (3D with different energy injection scales), we investigate the development of these coherent structures and characterize their shape. Methods. First, we present different methods to estimate the overall shape of the 3D structure using local measurements, foreseeing an application on satellite data. Then we study the local magnetic configuration inside and outside current peak regions, comparing the statistics in the two cases. Last, we compare the statistical properties of the local configuration obtained in simulations with the ones obtained analyzing an MMS (Magnetospheric MultiScale mission) dataset having similar plasma parameters. Results. Thanks to our analysis, (1) we validate the possibility of studying the overall shape of 3D structures using local methods, (2) we provide an overview of a local magnetic configuration emerging in different turbulent regimes, (3) we show that our 3D-3V simulations can reproduce the structures that emerge in MMS data for the periods considered.
引用
收藏
页数:18
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