2006/10/31 by A. Cuoco, G. Miele, Gennaro Miele +2 · 1 citation
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Dark Matter and Cosmic Phenomena #Radio Astronomy Observations and Technology #astro-ph #hep-ph
paper · pdf · doi:10.1103/physrevd.74.123008
published as Phys.Rev.D74:123008,2006 · 5 pages, 3 figures. Slightly enlarged discussion, clarifications added, results unchanged. Matches published version
arxiv created 2006/12/21 · openalex publication_date 2006/12/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The result of a recent publication by M. Kachelrie\ss and D. Semikoz of a broad maximum around 25 degrees in the two-point autocorrelation function of ultrahigh energy cosmic ray arrival directions has been intriguingly interpreted as the first imprint of the large scale structures (LSS) of baryonic matter in the near universe. We analyze this suggestion in light of the clustering properties expected from the PSCz astronomical catalogue of LSS. The chance probability of the signal is consistent within 2\ensuremathσ with the predictions based on the catalogue. No evidence for a significant cross correlation of the observed events with known overdensities in the LSS is found, which may be due to the role of the galactic and extragalactic magnetic fields, and is however consistent with the limited statistics. The larger statistics to be collected by the Pierre Auger Observatory is needed to answer definitely the question.