Obscured AGN in Multiwavelength Surveys
Abstract
Using a simple unification model for AGN, with a fixed ratio of obscured to unobscured AGN of 3:1, we explain the X-ray, optical and infrared properties of the X-ray sources in the GOODS fields. That is, the GOODS data are consistent with the existence of a large population of obscured AGN out to high redshifts. About half of these are so obscured that they are missed even by hard X-ray observations, and are detected only in deep infrared observations. The previously reported decreasing trend of obscured to total AGN ratio with increasing X-ray luminosity can be explained entirely as a selection effect.
Keywords
Cite
@article{arxiv.astro-ph/0411485,
title = {Obscured AGN in Multiwavelength Surveys},
author = {Ezequiel Treister and C. M. Urry and Jeff Van Duyne and the GOODS AGN Team},
journal= {arXiv preprint arXiv:astro-ph/0411485},
year = {2007}
}
Comments
4 pages, 2 figures, Proceedings of the workshop "Multiband Approach to AGN", Max-Planck-Institut fur Radioastronomie, Bonn September 30 - October 2, 2004, to be published in "Memorie della Societa Astronomica Italiana"