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arXiv · 0704.1298

The obscured quasar population from optical, mid-infrared, and X-ray surveys

C. Vignali·A. Comastri·D. M. Alexander
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Abstract

Over the last few years, optical, mid-infrared and X-ray surveys have brought to light a significant number of candidate obscured AGN and, among them, many Type 2 quasars, the long-sought after "big cousins'' of local Seyfert 2 galaxies. However, despite the large amount of multi-wavelength data currently available, a proper census and a panchromatic view of the obscured AGN/quasar population are still missing, mainly due to observational limitations. Here we provide a review of recent results on the identification of obscured AGN, focusing primarily on the population of Type 2 quasars selected in the optical band from the Sloan Digital Sky Survey.

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C. Vignali, A. Comastri, D. M. Alexander. 2007-04-10. The obscured quasar population from optical, mid-infrared, and X-ray surveys. https://arxiv.org/abs/0704.1298

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