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Title: A numerical assessment of cosmic-ray energy diffusion through turbulent media

How and where cosmic rays are produced, and how they diffuse through various turbulent media, represent fundamental problems in astrophysics with far-reaching implications, both in terms of our theoretical understanding of high-energy processes in the Milky Way and beyond, and the successful interpretation of space-based and ground based GeV and TeV observations. For example, recent and ongoing detections, e.g., by Fermi (in space) and HESS (in Namibia), of γ-rays produced in regions of dense molecular gas hold important clues for both processes. In this paper, we carry out a comprehensive numerical investigation of relativistic particle acceleration and transport through turbulent magnetized environments in order to derive broadly useful scaling laws for the energy diffusion coefficients.
Authors:
 [1] ;  [2]
  1. Physics Department, Xavier University, Cincinnati, OH 45207 (United States)
  2. Department of Physics, The Applied Math Program and Steward Observatory, The University of Arizona, AZ 85721 (United States)
Publication Date:
OSTI Identifier:
22357252
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 784; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCELERATION; ASTROPHYSICS; COSMIC RADIATION; DETECTION; DIFFUSION; GEV RANGE; MAGNETOHYDRODYNAMICS; MILKY WAY; RELATIVISTIC RANGE; SCALING LAWS; SPACE; TEV RANGE; TURBULENCE