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

doi:10.3847/0004-637X/829/1/33

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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 similar to 5
	Yang, Jinyi 5,6; Wang, Feige 5,6; Wu, Xue-Bing 5,8; Fan, Xiaohui 6,8; McGreer, Ian D.6; Bian, Fuyan 2; Yi, Weimin 4,7; Yang, Qian 5,6; Ai, Yanli 1; Dong, Xiaoyi 5
刊名	ASTROPHYSICAL JOURNAL
	2016-09-20
卷号	829 期号:1
关键词	Galaxies: Active Galaxies: High-redshift Quasars: General
ISSN号	0004-637X
DOI	10.3847/0004-637X/829/1/33
英文摘要	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.
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000385374500033
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/32731]
专题	中国科学院上海天文台
通讯作者	Yang, Jinyi
作者单位	1.Sun Yat Sen Univ, Sch Astron & Space Sci, Guangzhou 510275, Guangdong, Peoples R China 2.Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia 3.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 4.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China 5.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China 6.Univ Arizona, Steward Observ, 933 North Cherry Ave, Tucson, AZ 85721 USA 7.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Peoples R China 8.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Yang, Jinyi,Wang, Feige,Wu, Xue-Bing,et al. A SURVEY OF LUMINOUS HIGH-REDSHIFT QUASARS WITH SDSS AND WISE. II. THE BRIGHT END OF THE QUASAR LUMINOSITY FUNCTION AT z similar to 5[J]. ASTROPHYSICAL JOURNAL,2016,829(1).
APA	Yang, Jinyi.,Wang, Feige.,Wu, Xue-Bing.,Fan, Xiaohui.,McGreer, Ian D..,...&Yue, Minghao.(2016).A SURVEY OF LUMINOUS HIGH-REDSHIFT QUASARS WITH SDSS AND WISE. II. THE BRIGHT END OF THE QUASAR LUMINOSITY FUNCTION AT z similar to 5.ASTROPHYSICAL JOURNAL,829(1).
MLA	Yang, Jinyi,et al."A SURVEY OF LUMINOUS HIGH-REDSHIFT QUASARS WITH SDSS AND WISE. II. THE BRIGHT END OF THE QUASAR LUMINOSITY FUNCTION AT z similar to 5".ASTROPHYSICAL JOURNAL 829.1(2016).