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

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 parti...

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Bibliographic Details
Published in:The Astrophysical Journal
Main Authors: Lopez-Barquero, V., Xu, S., Desiati, P., Lazarian, A., Pogorelov, N. V., Yan, H.
Other Authors: Lopez-Barquero, V (reprint author), Univ Wisconsin, Dept Phys, Madison, WI 53706 USA., Univ Wisconsin, Dept Phys, Madison, WI 53706 USA., Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China., Univ Wisconsin, WIPAC, Madison, WI 53703 USA., Univ Wisconsin, Dept Astron, Madison, WI 53706 USA., Univ Alabama Huntsville, Dept Phys, Huntsville, AL 35899 USA., Univ Alabama Huntsville, Ctr Space Plasma & Aeron Res, 320 Sparkman Dr, Huntsville, AL 35805 USA., DESY, Platanenallee 6, D-15738 Zeuthen, Germany., Univ Potsdam, Inst Phys & Astron, D-14476 Potsdam, Germany.
Format: Journal/Newspaper
Language:English
Published: ASTROPHYSICAL JOURNAL 2017
Subjects:
cosmic rays
magnetic fields
magnetohydrodynamics (MHD)
solar wind
Sun: heliosphere
COMPRESSIBLE MAGNETOHYDRODYNAMIC TURBULENCE
ENERGETIC PARTICLE ANISOTROPIES
CHARGE-EXCHANGE INTERACTIONS
AIR-SHOWER ARRAY
ARRIVAL DIRECTIONS
ASTROPHYSICAL IMPLICATIONS
3-DIMENSIONAL FEATURES
OUTER HELIOSPHERE
HELIOPAUSE DRIVEN
SCALE ANISOTROPY
National Science Foundation Office of Polar Programs
Online Access:https://hdl.handle.net/20.500.11897/472832
https://doi.org/10.3847/1538-4357/aa74d1
Description
Summary: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. China Scholarship Council; US National Science Foundation Office of Polar Programs; NSF grant [AST-1212096, NSF-DMS-1622457]; NASA grant [X5166204101, NNX14AJ53G, NNX14AF43G, NNX15AN72G]; DOE grant [DE-SC0008334]; NSF [ACI-1615206] SCI(E) ARTICLE 1 842

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