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American Astronomical Society, Astrophysical Journal, 2(791), p. 113, 2014

DOI: 10.1088/0004-637x/791/2/113

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Mid-Infrared Selected Quasars I: Virial Black Hole Mass and Eddington Ratios

Journal article published in 2014 by Yu Sophia Dai ORCID, Christopher N. A. Willmer, Y. Sophia Dai, Martin S. Elvis, Jacqueline Bergeron, Giovanni Gene Fazio, Jia-Sheng Huang, Belinda Jane Wilkes, Alain Omont, Casey Papovich ORCID, Christopher Willmar
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We provide a catalog of 391 mid-infrared-selected (MIR; 24 μm) broad-emission-line (BEL; type 1) quasars in the 22 deg^2 SWIRE Lockman Hole field. This quasar sample is selected in the MIR from Spitzer MIPS with S_(24) > 400 μJy, jointly with an optical magnitude limit of r (AB) 19.1. We then investigate the continuum luminosity and line profiles of these MIR quasars, and estimate their virial black hole masses and the Eddington ratios. The supermassive black hole mass shows evidence of downsizing, although the Eddington ratios remain constant at 1