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    A SURVEY OF LUMINOUS HIGH-REDSHIFT QUASARS WITH SDSS AND WISE . II. THE BRIGHT END OF THE QUASAR LUMINOSITY FUNCTION AT z ∼ 5

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    Yang_2016_ApJ_829_33.pdf
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    Author
    Yang, Jinyi cc
    Wang, Feige cc
    Wu, Xue-Bing cc
    Fan, Xiaohui cc
    McGreer, Ian D. cc
    Bian, Fuyan cc
    Yi, Weimin
    Yang, Qian
    Ai, Yanli
    Dong, Xiaoyi cc
    Zuo, Wenwen
    Green, Richard
    Jiang, Linhua cc
    Wang, Shu
    Wang, Ran
    Yue, Minghao
    Show allShow less
    Affiliation
    Univ Arizona, Steward Observ
    Issue Date
    2016-09-20
    Keywords
    galaxies: active
    galaxies: high-redshift
    quasars: general
    
    Metadata
    Show full item record
    Publisher
    IOP PUBLISHING LTD
    Citation
    A SURVEY OF LUMINOUS HIGH-REDSHIFT QUASARS WITH SDSS AND WISE . II. THE BRIGHT END OF THE QUASAR LUMINOSITY FUNCTION AT z ∼ 5 2016, 829 (1):33 The Astrophysical Journal
    Journal
    The Astrophysical Journal
    Rights
    © 2016. The American Astronomical Society. All rights reserved.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    This is the second paper in a series on a new luminous z similar to 5 quasar survey using optical and near-infrared colors. Here we present a new determination of the bright end of the quasar luminosity function (QLF) at z similar to 5. Combining. our 45 new quasars with previously known quasars that satisfy our selections, we construct the largest uniform luminous z similar to 5 quasar sample to date, with 99 quasars in the range of 4.7 <= z < 5.4 and -29 < M-1450 <= -26.8, within the Sloan Digital Sky Survey (SDSS) footprint. We use a modified 1/V-a method including flux limit correction to derive a binned QLF, and we model the parametric QLF using maximum likelihood estimation. With the faint-end slope of the QLF fixed as alpha = -2.03 from previous deeper samples, the best fit of our QLF gives a flatter bright end slope beta = -3.58 +/- 0.24 and a fainter break magnitude M-1450(*) = -26.98 +/- 0.23 than previous studies at similar redshift. Combined with previous work at lower and higher redshifts, our result is consistent with a luminosity evolution and density evolution model. Using the best-fit QLF, the contribution of quasars to the ionizing background at z similar to 5 is found to be 18%-45% with a clumping factor C of 2-5. Our sample suggests an evolution of radio loud fraction with optical luminosity but no obvious evolution with redshift.
    Note
    No embargo.
    ISSN
    1538-4357
    DOI
    10.3847/0004-637X/829/1/33
    Version
    Final published version
    Sponsors
    NSFC [11373008, 11533001]; Strategic Priority Research Program " The Emergence of Cosmological Structures" of the Chinese Academy of Sciences [XDB09000000]; National Key Basic Research Program of China [2014CB845700]; Ministry of Science and Technology of China [2016YFA0400703]; US NSF grant [AST 11-07682]; Chinese Academy of Sciences; People's Government of Yunnan Province; Strategic Priority Research Program "The Emergence of Cosmological Structures" [XDB09000000]; National Astronomical Observatories, Chinese Academy of Sciences; Special Fund for Astronomy from the Ministry of Finance in China; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences; Alfred P. Sloan Foundation; National Science Foundation; U.S. Department of Energy Office of Science; University of Arizona; Brazilian Participation Group; Brookhaven National Laboratory; University of Cambridge; Carnegie Mellon University; University of Florida; French Participation Group; German Participation Group; Harvard University; Instituto de Astrofisica de Canarias; 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; Spanish Participation Group; University of Tokyo; University of Utah; Vanderbilt University; University of Virginia; University of Washington; Yale University; National Aeronautics and Space Administration
    Additional Links
    http://stacks.iop.org/0004-637X/829/i=1/a=33?key=crossref.7f9e1777eb8ac605fe8c05da628e63ec
    ae974a485f413a2113503eed53cd6c53
    10.3847/0004-637X/829/1/33
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    UA Faculty Publications

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