Obscured accreting black holes at high redshift
A. Comastri, F. Fiore, C. Vignali, M. Brusa, F. Civano
Abstract
A significant fraction of the accreting black holes powering high redshift AGN are obscured by large columns of dust and gas. For this reason, luminous type 2 quasars can be efficiently discovered combining hard X-ray and near-infrared observations. We will briefly discuss the most recent results.
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