期刊
ASTRONOMICAL JOURNAL
卷 126, 期 5, 页码 2125-2144出版社
UNIV CHICAGO PRESS
DOI: 10.1086/378610
关键词
galaxies : active; quasars : emission lines; quasars : general; surveys
Type II quasars are the long-sought luminous analogs of type 2 (narrow emission line) Seyfert galaxies, suggested by unification models of active galactic nuclei (AGNs) and postulated to account for an appreciable fraction of the cosmic hard X-ray background. We present a sample of 291 type II AGNs at redshifts 0.3
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