The contribution of AGNs to the X-ray background
Abstract
We report the results of a detailed analysis of the contribution of various classes of AGNs to the extragalactic X-ray background (XRB). The model is based on the unification schemes of AGNs and on their related X-ray spectral properties in the light of recent observational results. The integrated emission from AGNs, when folded with an appropriate cosmological evolution law, can provide a good fit to the XRB over a wide energy range, from several to 100 keV, while it contributes only about 74\% of the ROSAT soft XRB. The model predictions have been checked against all available observational constraints from both hard and soft X-ray surveys (counts, redshift distributions and average X-ray source spectral properties).
Cite
@article{arxiv.astro-ph/9409067,
title = {The contribution of AGNs to the X-ray background},
author = {A. Comastri and G. Setti and G. Zamorani and G. Hasinger},
journal= {arXiv preprint arXiv:astro-ph/9409067},
year = {2011}
}
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