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Title: TeV Cosmic-Ray Anisotropy from the Magnetic Field at the Heliospheric Boundary

Abstract

We performed numerical calculations to test the suggestion by Desiati and Lazarian that the anisotropies of TeV cosmic rays may arise from their interactions with the heliosphere. For this purpose, we used a magnetic field model of the heliosphere and performed direct numerical calculations of particle trajectories. Unlike earlier papers testing the idea, we did not employ time-reversible techniques that are based on Liouville’s theorem. We showed numerically that for scattering by the heliosphere, the conditions of Liouville’s theorem are not satisfied, and the adiabatic approximation and time-reversibility of the particle trajectories are not valid. Our results indicate sensitivity to the magnetic structure of the heliospheric magnetic field, and we expect that this will be useful for probing this structure in future research.

Authors:
 [1];  [2];  [3];  [4];  [5];  [6]
  1. Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)
  2. Department of Astronomy, School of Physics, Peking University, Beijing 100871 (China)
  3. Wisconsin IceCube Particle Astrophysics Center (WIPAC), University of Wisconsin, Madison, WI 53703 (United States)
  4. Department of Astronomy, University of Wisconsin, Madison, WI 53706 (United States)
  5. Department of Physics, University of Alabama in Huntsville, Huntsville, AL 35899 (United States)
  6. DESY, Platanenallee 6, D-15738 Zeuthen (Germany)
Publication Date:
OSTI Identifier:
22663504
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 842; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ADIABATIC APPROXIMATION; ANISOTROPY; COSMIC RADIATION; HELIOSPHERE; INTERACTIONS; MAGNETIC FIELDS; MAGNETOHYDRODYNAMICS; SCATTERING; SENSITIVITY; SOLAR WIND; SUN; TEV RANGE

Citation Formats

López-Barquero, V., Xu, S., Desiati, P., Lazarian, A., Pogorelov, N. V., and Yan, H. TeV Cosmic-Ray Anisotropy from the Magnetic Field at the Heliospheric Boundary. United States: N. p., 2017. Web. doi:10.3847/1538-4357/AA74D1.
López-Barquero, V., Xu, S., Desiati, P., Lazarian, A., Pogorelov, N. V., & Yan, H. TeV Cosmic-Ray Anisotropy from the Magnetic Field at the Heliospheric Boundary. United States. doi:10.3847/1538-4357/AA74D1.
López-Barquero, V., Xu, S., Desiati, P., Lazarian, A., Pogorelov, N. V., and Yan, H. Sat . "TeV Cosmic-Ray Anisotropy from the Magnetic Field at the Heliospheric Boundary". United States. doi:10.3847/1538-4357/AA74D1.
@article{osti_22663504,
title = {TeV Cosmic-Ray Anisotropy from the Magnetic Field at the Heliospheric Boundary},
author = {López-Barquero, V. and Xu, S. and Desiati, P. and Lazarian, A. and Pogorelov, N. V. and Yan, H.},
abstractNote = {We performed numerical calculations to test the suggestion by Desiati and Lazarian that the anisotropies of TeV cosmic rays may arise from their interactions with the heliosphere. For this purpose, we used a magnetic field model of the heliosphere and performed direct numerical calculations of particle trajectories. Unlike earlier papers testing the idea, we did not employ time-reversible techniques that are based on Liouville’s theorem. We showed numerically that for scattering by the heliosphere, the conditions of Liouville’s theorem are not satisfied, and the adiabatic approximation and time-reversibility of the particle trajectories are not valid. Our results indicate sensitivity to the magnetic structure of the heliospheric magnetic field, and we expect that this will be useful for probing this structure in future research.},
doi = {10.3847/1538-4357/AA74D1},
journal = {Astrophysical Journal},
number = 1,
volume = 842,
place = {United States},
year = {Sat Jun 10 00:00:00 EDT 2017},
month = {Sat Jun 10 00:00:00 EDT 2017}
}