Anisotropy of arrival directions of E 0 ⩾ 8 × 1018 eV cosmic rays and cosmic microwave background

Abstract

Results are presented that were obtained by analyzing the arrival directions of E 0 ⩾ 8 × 1018 eV primary cosmic rays recorded at the Yakutsk array over the period between 1974 and 2003 and at the SUGAR array (Australia). The greatest primary-cosmic-ray flux is shown to arrive from the region of visible intersection of the planes of the Galaxy and the Supergalaxy (local supercluster of galaxies) at a galactic longitude of about 137°. On a global scale, the lowest temperature of the cosmic microwave background is typical of this region.