Assessing the Structure of Isotropic and Anisotropic Turbulent Magnetic Fields

被引:1
作者
Fatuzzo, Marco [1 ]
Holden, Lisa [2 ]
Grayson, Lindsay [2 ]
Wallace, Kirk [2 ]
机构
[1] Xavier Univ, Dept Phys, Cincinnati, OH 45207 USA
[2] Northern Kentucky Univ, Dept Math & Stat, Highland Hts, KY 41099 USA
关键词
cosmic rays; ISM: general; ISM: magnetic fields; magnetohydrodynamics (MHD); COMPRESSIBLE MAGNETOHYDRODYNAMIC TURBULENCE; COSMIC-RAY ACCELERATION; MOLECULAR CLOUDS; STAR-FORMATION; INTERSTELLAR TURBULENCE; ALFVENIC TURBULENCE; AMBIPOLAR DIFFUSION; CHARGED-PARTICLES; GALACTIC-CENTER; POWER SPECTRUM;
D O I
10.1088/1538-3873/128/968/104301
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Turbulent magnetic fields permeate our universe, impacting a wide range of astronomical phenomena across all cosmic scales. A clear example is the magnetic field that threads the interstellar medium (ISM), which impacts the motion of cosmic rays through that medium. Understanding the structure of magnetic turbulence within the ISM and how it relates to the physical quantities that characterize it can thus inform our analysis of particle transport within these regions. Toward that end, we probe the structure of magentic turbulence through the use of Lyapunov exponents for a suite of isotropic and nonisotropic Alfvenic turbulence profiles. Our results provide a means of calculating a "turbulence lengthscale" that can then be connected to how cosmic rays propagate through magentically turbulent environments, and we perform such an analysis for molecular cloud environments.
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页数:10
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