High-energy cosmology -: γ Rays and neutrinos from beyond the galaxy

被引：3

作者：

Dermer, Charles D. ^{[1
]}

机构：

[1] USN, Res Lab, Washington, DC 20375 USA

来源：

ASTROPHYSICS AND SPACE SCIENCE | 2007年 / 309卷 / 1-4期

关键词：

gamma-ray bursts; clusters of galaxies; starburst galaxies; blazars; microquasars;

D O I：

10.1007/s10509-007-9417-8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Our knowledge of the high-energy universe is undergoing a period of rapid change as new astronomical detectors of high-energy radiation start to operate at their design sensitivities. Now is a boorntime for high-energy astrophysics, with new discoveries from Swift and HESS, results from MAGIC and VERITAS starting to be reported, the upcoming launches of the gamma-ray space telescopes GLAST and AGILE, and anticipated data releases from IceCube and Auger. A formalism for calculating statistical properties of cosmological gamma-ray sources is presented. Application is made to model calculations of the statistical distributions of gamma-ray and neutrino emission from (i) beamed sources, specifically, long-duration GRBs, blazars, and extragalactic microquasars, and (ii) unbeamed sources, including normal galaxies, starburst galaxies and clusters. Expressions for the integrated intensities of faint beamed and unbeamed high-energy radiation sources are also derived. A toy model for the background intensity of radiation from dark-matter annihilation taking place in the early universe is constructed. Estimates for the gamma-ray fluxes of local group galaxies, starburst, and infrared luminous galaxies are briefly reviewed. Because the brightest extragalactic gamma-ray sources are flaring sources, and these are the best targets for sources of PeV-EeV neutrinos and ultra-high energy cosmic rays, rapidly slewing all-sky telescopes like MAGIC and an all-sky gamma-ray observatory beyond Milagro will be crucial for optimal science return in the multi-messenger age.

引用

页码：127 / 137

页数：11

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