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

Teoretisk højenergi, astropartikel og gravitationel fysik

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

3 Citationer (Scopus)

109 Downloads (Pure)

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.

Originalsprog	Engelsk
Artikelnummer	012004
Tidsskrift	Journal of Physics
Vol/bind	1181
Udgave nummer	Conference 1
Antal sider	11
ISSN	0976-7673
DOI	https://doi.org/10.1088/1742-6596/1181/1/012004
Status	Udgivet - 10 mar. 2019

Bibliografisk note

10 pages, 4 figures, Proceedings of the 26th Extended European Cosmic Ray Symposium 2018

Emneord

astro-ph.HE

Adgang til dokumentet

10.1088/1742-6596/1181/1/012004Licens: CC BY

Ahlers_2019_J._Phys.__Conf._Ser._1181_012004Forlagets udgivne version, 2,54 MB

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Citationsformater

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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.

AB - 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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