@article{11e3618fc262479b96d7b9fd1262dea6,
title = "Deep CFHT Y-band Imaging of VVDS-F22 Field. II. Quasar Selection and Quasar Luminosity Function",
abstract = "We report the results of a faint quasar survey in a one-square-degree field. The aim is to test the Y - K g - z and J - K i - Y color selection criteria for quasars at faint magnitudes to obtain a complete sample of quasars based on deep optical and near-infrared color-color selection and to measure the faint end of the quasar luminosity function (QLF) over a wide redshift range. We carried out a quasar survey based on the Y - K g - z and J - K i - Y quasar selection criteria, using the deep Y-band data obtained from our CFHT/WIRCam Y-band images in a two-degree field within the F22 field of the VIMOS VLT deep survey, optical co-added data from Sloan Digital Sky Survey Stripe 82 and deep near-infrared data from the UKIDSS Deep Extragalactic Survey in the same field. We discovered 25 new quasars at 0.5 < z < 4.5 and i < 22.5 mag within one-square-degree field. The survey significantly increases the number of faint quasars in this field, especially at z ∼ 2-3. It confirms that our color selections are highly complete in a wide redshift range (z < 4.5), especially over the quasar number density peak at z ∼ 2-3, even for faint quasars. Combining all previous known quasars and new discoveries, we construct a sample with 109 quasars and measure the binned QLF and parametric QLF. Although the sample is small, our results agree with a pure luminosity evolution at lower redshift and luminosity evolution and density evolution model at redshift z > 2.5.",
keywords = "galaxies: active, galaxies: high-redshift, quasars: emission lines, quasars: general",
author = "Jinyi Yang and Wu, {Xue Bing} and Dezi Liu and Xiaohui Fan and Qian Yang and Feige Wang and McGreer, {Ian D.} and Zuhui Fan and Shuo Yuan and Huanyuan Shan",
note = "Funding Information: J.Y. and X.-B.W. thank the supports by the NSFC grant Nos. 11373008 and 11533001, the Strategic Priority Research Program The Emergence of Cosmological Structures of the Chinese Academy of Sciences, grant No. XDB09000000, the National Key Basic Research Program of China 2014CB845700, and from the Ministry of Science and Technology of China under grant 2016YFA0400703. D.-Z. L., S.Y., and Z.-H.F. acknowledge the support from NSFC of China under grants 11333001, 11173001, and 11033005, and from the Strategic Priority Research Program The Emergence of Cosmological Structure of the Chinese Academy of Science, grant No. XDB09000000. X.F. and I.D.M. acknowledge the support from US NSF grant AST 15-15115 and NASA ADAP grant NNX17AF28G. Funding Information: J.Y. and X.-B.W. thank the supports by the NSFC grant Nos. 11373008 and 11533001, the Strategic Priority Research Program “The Emergence of Cosmological Structures” of the Chinese Academy of Sciences, grant No. XDB09000000, the National Key Basic Research Program of China 2014CB845700, and from the Ministry of Science and Technology of China under grant 2016YFA0400703. D.-Z. L., S.Y., and Z.-H.F. acknowledge the support from NSFC of China under grants 11333001, 11173001, and 11033005, and from the Strategic Priority Research Program “The Emergence of Cosmological Structure” of the Chinese Academy of Science, grant No. XDB09000000. X.F. and I.D.M. acknowledge the support from US NSF grant AST 15-15115 and NASA ADAP grant NNX17AF28G. H.-Y.S. acknowledges the support from TR33 project “The Dark Universe” funded by the DFG. This research uses data obtained through the Telescope Access Program (TAP), which has been funded by the Strategic Priority Research Program “The Emergence of Cosmological Structures” (grant No. XDB09000000), National Astronomical Observatories, Chinese Academy of Sciences, and the Special Fund for Astronomy from the Ministry of Finance in China. We acknowledge the use of the CFHT and the MMT 6.5 m telescopes. This work was partially supported by the Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences. Funding Information: We acknowledge the use of SDSS photometric data. Funding for SDSS-III has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, and the U.S. Department of Energy Office of Science. The SDSS-III Web site ishttp://www.sdss3.org/. SDSS-III is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS-III Collaboration including the University of Arizona, the Brazilian Participation Group, Brookhaven National Laboratory, University of Cambridge, Carnegie Mellon University, University of Florida, the French Participation Group, the German Participation Group, Harvard University, the Instituto de Astrofisica de Canarias, the Michigan State/Notre Dame/ JINA Participation Group, Johns Hopkins University, Lawrence Berkeley National Laboratory, Max Planck Institute for Astrophysics, Max Planck Institute for Extraterrestrial Physics, New Mexico State University, New York University, Ohio State University, Pennsylvania State University, University of Portsmouth, Princeton University, the Spanish Participation Group, University of Tokyo, University of Utah, Vanderbilt University, University of Virginia, University of Washington, and Yale University. We acknowledge the use of the UKIDSS data and Hubble Source Catalog.9 Publisher Copyright: {\textcopyright} 2018. The American Astronomical Society. All rights reserved.",
year = "2018",
month = mar,
doi = "10.3847/1538-3881/aaa543",
language = "English (US)",
volume = "155",
journal = "Astronomical Journal",
issn = "0004-6256",
publisher = "IOP Publishing Ltd.",
number = "3",
}