Candidate Type II Quasars from the Sloan Digital Sky Survey: I. Selection and Optical Properties of a Sample at 0.3<Z<0.83

Type II quasars are the long-sought luminous analogs of type II (narrow emission line) Seyfert galaxies, suggested by unification models of active galactic nuclei (AGN) and postulated to account for an appreciable fraction of the cosmic hard X-ray background. We present a sample of 291 type II AGN a...

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Bibliographic Details
Published in:arXiv.org 2003-09
Main Authors: Zakamska, Nadia L, Strauss, Michael A, Krolik, Julian H, Collinge, M J, Hall, P B, Hao, L, Heckman, T M, Ivezic, Z, Richards, G T, Schlegel, D J, Schneider, D P, Strateva, I, Vanden Berk, D E, Anderson, S F, Brinkmann, J
Format: Article
Language:English
Subjects:
Active galactic nuclei
Astronomical models
Background radiation
Ionization
Optical properties
Quasars
Seyfert galaxies
Sky surveys (astronomy)
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Summary:Type II quasars are the long-sought luminous analogs of type II (narrow emission line) Seyfert galaxies, suggested by unification models of active galactic nuclei (AGN) and postulated to account for an appreciable fraction of the cosmic hard X-ray background. We present a sample of 291 type II AGN at redshifts 0.3
ISSN:2331-8422
DOI:10.48550/arxiv.0309551