Explaining TeV Cosmic-Ray Anisotropies with Non-Diffusive Cosmic-Ray Propagation

Abstract

Constraining the behavior of cosmic ray data observed at Earth requires a precise understanding of how the cosmic rays propagate in the interstellar medium. The interstellar medium is not homogeneous; although turbulent magnetic fields dominate over large scales, small coherent regions of magnetic field exist on scales relevant to particle propagation in the nearby Galaxy. Guided propagation through a coherent field is significantly different from random particle diffusion and could be the explanation of spatial anisotropies in the observed cosmic rays. We present a Monte Carlo code to propagate cosmic particle through realistic magnetic field structures. We discuss the details of the model as well as some preliminary studies which indicate that coherent magnetic structures are important effects in local cosmic-ray propagation, increasing the flux of cosmic rays by over two orders of magnitude at anisotropic locations on the sky. The features induced by coherent magnetic structure could be the cause of the observed TeV cosmic-ray anisotropy.

10 pages, 5 figures

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Cited by in corpus (11)

• The origin of Galactic cosmic rays: challenges to the standard paradigm
• Origin of Small-Scale Anisotropies in Galactic Cosmic Rays
• Observation of Anisotropy of TeV Cosmic Rays with Two Years of HAWC
• Neutrinos and Cosmic Rays Observed by IceCube
• Transport of Protostellar Cosmic Rays in Turbulent Dense Cores
• No longer ballistic, not yet diffusive--the formation of cosmic ray small-scale anisotropies
• Observation of Cosmic-Ray Anisotropy in the Southern Hemisphere with 12 yr of Data Collected by the IceCube Neutrino Observatory
• Probing the astrophysical origin of high-energy cosmic-ray electrons with Monte Carlo simulation
• Cosmic Ray transport in mixed magnetic fields and their role on the observed anisotropies
• Chaotic Behavior of Trapped Cosmic Rays
• The Influence of Sun's and Moon's Shadows on Cosmic-Ray Anisotropy