a Snapshot Survey of the Optically Selected TYPE-2 Quasars

Details a Snapshot Survey of the Optically Selected TYPE-2 Quasars a Snapshot Survey of the Optically Selected TYPE-2 Quasars

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..907d&link_type=abstract

Chandra Proposal ID #03700016

Computer Science

Chandra Proposal Id #03700016

Scientific paper

We identified a population of emission-line objects in DPOSS, which can be plausibly interpreted as the long-sought type-2 quasars. They have high-ionization Seyfert-2 like spectra, but with narrow-line luminosities comparable to those of the luminous type-1 quasars in the same redshift range. Keck spectropolarimetry confirms the presence of hidden QSO nuclei in them. This provides a major piece of evidence in favor of the unified schemes for AGN, and it should help extend our understanding of AGN in general. This population may be a major contributor to the cosmic hard x-ray background. It is complementary to the optically dull hard x-ray sources found by Chandra.

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