A search for small-scale anisotropy of PeV cosmic rays

作者：Zotov M Yu^*; Kulikov G V

来源：Astronomy Letters, 2012, 38(11): 731-743.

DOI：10.1134/S1063773712110072

• extensive air showers
• Galactic cosmic rays
• sources of cosmic rays
• anisotropy

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 degrees 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.

• 出版日期2012-11