The Cosmic Evolution of Hard X-Ray-selected Active Galactic Nuclei

We use highly spectroscopically complete deep and wide-area Chandra surveys to determine the cosmic evolution of hard X-ray-selected active galactic nuclei (AGNs). For the deep fields, we supplement the spectroscopic redshifts with photometric redshifts to assess where the unidentified sources are l...

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Bibliographic Details
Published in:The Astronomical journal 2005-02, Vol.129 (2), p.578-609
Main Authors: Barger, A. J, Cowie, L. L, Mushotzky, R. F, Yang, Y, Wang, W.-H, Steffen, A. T, Capak, P
Format: Article
Language:English
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Summary:We use highly spectroscopically complete deep and wide-area Chandra surveys to determine the cosmic evolution of hard X-ray-selected active galactic nuclei (AGNs). For the deep fields, we supplement the spectroscopic redshifts with photometric redshifts to assess where the unidentified sources are likely to lie. We find that the median redshifts are fairly constant with X-ray flux at z ~ 1.
ISSN:1538-3881
0004-6256
1538-3881
DOI:10.1086/426915