Non-thermal cosmic backgrounds and prospects for future high-energy observations of blazars

Details Non-thermal cosmic backgrounds and prospects for future high-energy observations of blazars Non-thermal cosmic backgrounds and prospects for future high-energy observations of blazars

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005exa....20...31g&link_type=abstract

Experimental Astronomy, Volume 20, Issue 1-3, pp. 31-40

Astronomy and Astrophysics

Astronomy

2

Galaxies:Active, Galaxies: Blazar: Bl Lacertae Surveys

Scientific paper

We discuss the contribution of the blazar population to the extragalactic background radiation across the electromagnetic (e.m.) spectrum with particular reference to the microwave, hard-X-ray and γ-ray bands. Our estimates are based on a recently derived blazar radio LogN-LogS that was built by combining several radio and multi-frequency surveys. We show that blazar emission integrated over cosmic time gives rise to a considerable broad-band non-thermal cosmic background that dominates the extragalactic brightness in the high-energy part of the e.m. spectrum. We also estimate the number of blazars that are expected to be detected by future planned or hypothetical missions operating in the X-ray and γ-ray energy bands.

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