3 papers
astro-ph2005
AGN Unification and the X-ray Background
Ezequiel Treister, C. M. Urry
Active Galactic Nuclei (AGN) unification, which implies a large number of obscured AGN, can explain the optical, infrared and X-ray content of deep multiwavelength surveys. Here, w…
astro-ph2005
Infrared Number Counts of AGN in the GOODS Fields
E. Treister, C. Megan Urry, the GOODS AGN Team
Using the known numbers and evolution of unobscured AGN, and assuming that there is a large number of corresponding obscured AGN -- as expected if AGN unification is correct -- we…
astro-ph2004
Obscured AGN in Multiwavelength Surveys
Ezequiel Treister, C. M. Urry, Jeff Van Duyne +1
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…