The Dipole Anisotropy of Galactic Cosmic Rays

Markus Ahlers

doi:10.1088/1742-6596/1181/1/012004

The Dipole Anisotropy of Galactic Cosmic Rays

Markus Ahlers

Theoretical high energy, astroparticle and gravitational physics

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Abstract

The arrival directions of Galactic cosmic rays exhibit anisotropies up to the level of one per-mille over various angular scales. Recent observations of TeV-PeV cosmic rays show that the dipole anisotropy has a strong energy dependence with a phase-flip around 100 TeV. We argue that this behavior can be well understood by the combination of various effects: the anisotropic diffusion of cosmic rays, the presence of nearby sources, the Compton-Getting effect from our relative motion and the reconstruction bias of ground-based observatories.

Original language	Undefined/Unknown
Article number	012004
Journal	Journal of Physics
Volume	1181
Issue number	Conference 1
Number of pages	11
ISSN	0976-7673
DOIs	https://doi.org/10.1088/1742-6596/1181/1/012004
Publication status	Published - 10 Mar 2019

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Cite this

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N2 - The arrival directions of Galactic cosmic rays exhibit anisotropies up to the level of one per-mille over various angular scales. Recent observations of TeV-PeV cosmic rays show that the dipole anisotropy has a strong energy dependence with a phase-flip around 100 TeV. We argue that this behavior can be well understood by the combination of various effects: the anisotropic diffusion of cosmic rays, the presence of nearby sources, the Compton-Getting effect from our relative motion and the reconstruction bias of ground-based observatories.

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