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Title: First hints of large scale structures in the ultrahigh energy sky?

Abstract

The result of the recent publication [1] of a broad maximum around 25 degrees in the two-point autocorrelation function of ultra-high 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 {sigma} 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.

Authors:
; ;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
899714
Report Number(s):
FERMILAB-PUB-06-372-A
arXiv eprint number astro-ph/0610374; TRN: US200708%%499
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
Phys.Rev.D74:123008,2006
Additional Journal Information:
Journal Name: Phys.Rev.D74:123008,2006
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; MAGNETIC FIELDS; PROBABILITY; SKY; STATISTICS; UNIVERSE; Astrophysics

Citation Formats

Cuoco, A, Miele, G, /Naples U. /INFN, Naples, Serpico, Pasquale D, and /Fermilab. First hints of large scale structures in the ultrahigh energy sky?. United States: N. p., 2006. Web. doi:10.1103/PhysRevD.74.123008.
Cuoco, A, Miele, G, /Naples U. /INFN, Naples, Serpico, Pasquale D, & /Fermilab. First hints of large scale structures in the ultrahigh energy sky?. United States. doi:10.1103/PhysRevD.74.123008.
Cuoco, A, Miele, G, /Naples U. /INFN, Naples, Serpico, Pasquale D, and /Fermilab. Sun . "First hints of large scale structures in the ultrahigh energy sky?". United States. doi:10.1103/PhysRevD.74.123008. https://www.osti.gov/servlets/purl/899714.
@article{osti_899714,
title = {First hints of large scale structures in the ultrahigh energy sky?},
author = {Cuoco, A and Miele, G and /Naples U. /INFN, Naples and Serpico, Pasquale D and /Fermilab},
abstractNote = {The result of the recent publication [1] of a broad maximum around 25 degrees in the two-point autocorrelation function of ultra-high 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 {sigma} 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.},
doi = {10.1103/PhysRevD.74.123008},
journal = {Phys.Rev.D74:123008,2006},
number = ,
volume = ,
place = {United States},
year = {2006},
month = {10}
}