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Paper: High-redshift Obscured Quasars
Volume: 373, The Central Engine of Active Galactic Nuclei
Page: 728
Authors: Martinez-Sansigre, A.; Rawlings, S.
Abstract: Using mid-infrared and radio criteria, we select a sample of candidate z ~ 2 obscured quasars. Optical spectroscopy confirms about half of these as type 2 quasars, and modelling the population suggests 5080% of the quasars are obscured. We find some flat radio spectrum type 2 quasars, and tentative evidence for obscuration unrelated to the torus. Using a similar sample, we also find evidence for a significant fraction of Compton-thick quasars.
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