Explaining TeV cosmic-ray anisotropies with non-diffusive cosmic-ray propagation

Harding, James Patrick; Fryer, Chris Lee; Mendel, Susan Marie

doi:10.3847/0004-637X/822/2/102

Title: Explaining TeV cosmic-ray anisotropies with non-diffusive cosmic-ray propagation

Journal Article · Wed May 11 00:00:00 EDT 2016 · The Astrophysical Journal (Online)

DOI:https://doi.org/10.3847/0004-637X/822/2/102· OSTI ID:1334145

Harding, James Patrick ^[1];

^[1]; Mendel, Susan Marie ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

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. Furthermore, the features induced by coherent magnetic structure could be the cause of the observed TeV cosmic-ray anisotropy.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1334145

Report Number(s):: LA-UR-15-27838

Journal Information:: The Astrophysical Journal (Online), Vol. 822, Issue 2; ISSN 1538-4357

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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