skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: The Signature of Large Scale Structures on the Very High Energy Gamma-Ray Sky

Abstract

If the diffuse extragalactic gamma ray emission traces the large scale structures of the universe, peculiar anisotropy patterns are expected in the gamma ray sky. In particular, because of the cutoff distance introduced by the absorption of 0.1-10 TeV photons on the infrared/optical background, prominent correlations with the local structures within a range of few hundreds Mpc should be present. We provide detailed predictions of the signal based on the PSCz map of the local universe. We also use mock N-body catalogues complemented with the halo model of structures to study some statistical features of the expected signatures. The results are largely independent from cosmological details, and depend mostly on the index of correlation (or bias) of the sources with respect to the large scale distribution of galaxies. For instance, the predicted signal in the case of a quadratic correlation (as it may happen for a dark matter annihilation contribution to the diffuse gamma flux) differs substantially from a linear correlation case, providing a complementary tool to unveil the nature of the sources of the diffuse gamma ray emission. The chances of the present and future space and ground based observatories to measure these features are discussed.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
899712
Report Number(s):
FERMILAB-PUB-06-478-A
arXiv eprint number astro-ph/0612559; TRN: US200720%%59
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
JCAP 0704:013,2007
Additional Journal Information:
Journal Name: JCAP 0704:013,2007
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS, 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ABSORPTION; ANISOTROPY; ANNIHILATION; DISTRIBUTION; GALAXIES; NONLUMINOUS MATTER; PHOTONS; SKY; UNIVERSE; Astrophysics, Phenomenology-HEP

Citation Formats

Cuoco, A, /Naples U. /INFN, Naples, Hannestad, S, Haugbolle, T, /Aarhus U., Miele, G, /Naples U. /INFN, Naples, Serpico, P D, /Fermilab, Tu, H, and /Aarhus U. /UC, Irvine. The Signature of Large Scale Structures on the Very High Energy Gamma-Ray Sky. United States: N. p., 2006. Web.
Cuoco, A, /Naples U. /INFN, Naples, Hannestad, S, Haugbolle, T, /Aarhus U., Miele, G, /Naples U. /INFN, Naples, Serpico, P D, /Fermilab, Tu, H, & /Aarhus U. /UC, Irvine. The Signature of Large Scale Structures on the Very High Energy Gamma-Ray Sky. United States.
Cuoco, A, /Naples U. /INFN, Naples, Hannestad, S, Haugbolle, T, /Aarhus U., Miele, G, /Naples U. /INFN, Naples, Serpico, P D, /Fermilab, Tu, H, and /Aarhus U. /UC, Irvine. Fri . "The Signature of Large Scale Structures on the Very High Energy Gamma-Ray Sky". United States. https://www.osti.gov/servlets/purl/899712.
@article{osti_899712,
title = {The Signature of Large Scale Structures on the Very High Energy Gamma-Ray Sky},
author = {Cuoco, A and /Naples U. /INFN, Naples and Hannestad, S and Haugbolle, T and /Aarhus U. and Miele, G and /Naples U. /INFN, Naples and Serpico, P D and /Fermilab and Tu, H and /Aarhus U. /UC, Irvine},
abstractNote = {If the diffuse extragalactic gamma ray emission traces the large scale structures of the universe, peculiar anisotropy patterns are expected in the gamma ray sky. In particular, because of the cutoff distance introduced by the absorption of 0.1-10 TeV photons on the infrared/optical background, prominent correlations with the local structures within a range of few hundreds Mpc should be present. We provide detailed predictions of the signal based on the PSCz map of the local universe. We also use mock N-body catalogues complemented with the halo model of structures to study some statistical features of the expected signatures. The results are largely independent from cosmological details, and depend mostly on the index of correlation (or bias) of the sources with respect to the large scale distribution of galaxies. For instance, the predicted signal in the case of a quadratic correlation (as it may happen for a dark matter annihilation contribution to the diffuse gamma flux) differs substantially from a linear correlation case, providing a complementary tool to unveil the nature of the sources of the diffuse gamma ray emission. The chances of the present and future space and ground based observatories to measure these features are discussed.},
doi = {},
journal = {JCAP 0704:013,2007},
number = ,
volume = ,
place = {United States},
year = {2006},
month = {12}
}