A Search for Small-Scale Anisotropy of PeV Cosmic Rays

Details A Search for Small-Scale Anisotropy of PeV Cosmic Rays A Search for Small-Scale Anisotropy of PeV Cosmic Rays

2012-03-12

arxiv.org/abs/1203.2472v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

16 pages with 4 figures

Scientific paper

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 degrees. We study correlation of these regions with positions of potential astrophysical sources of CRs and discuss a possible origin of the observed anisotropy.

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