A search for small-scale anisotropy of PeV cosmic rays

Recent results of Milagro, Tibet, ARGO-YBJ, and IceCube experiments on the small-scale anisotropy of Galactic cosmic rays (CRs) with energies from units up to a few hundred TeV arise a question on a possible nature of the observed phenomenon, as well as on the anisotropy of CRs at higher energies. A...

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Bibliographic Details
Published in:Astronomy letters 2012-11, Vol.38 (11), p.731-743
Main Authors: Zotov, M. Yu, Kulikov, G. V.
Format: Article
Language:English
Subjects:
Anisotropy
Astronomy
Astrophysics
Astrophysics and Astroparticles
Cosmic rays
Observations and Techniques
Physics
Physics and Astronomy
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Summary:Recent results of Milagro, Tibet, ARGO-YBJ, and IceCube experiments on the small-scale anisotropy of Galactic cosmic rays (CRs) with energies from units up to a few hundred TeV arise a question on a possible nature of the observed phenomenon, as well as on the anisotropy of CRs at higher energies. An analysis of a small-scale anisotropy of CRs with energies at around PeV registered with the EAS MSU array presented in the article, reveals a number of regions with an excessive flux. A typical size of the regions varies from 3° up to 12°. We study correlation of these regions with positions of potential astrophysical sources of CRs and discuss a possible origin of the observed anisotropy.
ISSN:1063-7737
1562-6873
DOI:10.1134/S1063773712110072