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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

文献类型：期刊论文

作者Yang, Jinyi1,2; Wang, Feige1,2; Wu, Xue-Bing1,3; Fan, Xiaohui2,3; McGreer, Ian D.2; Bian, Fuyan4,9; Yi WM(易卫敏)5,6; Yang, Qian1,2; Ai, Yanli7; Dong, Xiaoyi1
刊名ASTROPHYSICAL JOURNAL
出版日期2016-09-20
卷号829期号:1
ISSN号0004-637X
关键词galaxies: active galaxies: high-redshift quasars: general
通讯作者Yang, JY
产权排序第五完成单位
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.
学科主题Astronomy & Astrophysics
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
关键词[WOS]DIGITAL-SKY-SURVEY ; RADIO-LOUD FRACTION ; OPTICALLY SELECTED QUASARS ; SURVEY COMMISSIONING DATA ; ACTIVE GALACTIC NUCLEI ; STELLAR OBJECTS ; SPECTROSCOPIC SURVEY ; INTERGALACTIC MEDIUM ; VLA OBSERVATIONS ; DATA RELEASE
收录类别SCI
原文出处http://iopscience.iop.org/article/10.3847/0004-637X/829/1/33/meta
语种英语
WOS记录号WOS:000385374500033
源URL[http://ir.ynao.ac.cn/handle/114a53/9745]  
专题云南天文台_丽江天文观测站（南方基地）
云南天文台_中国科学院天体结构与演化重点实验室
作者单位1.Department of Astronomy, School of Physics, Peking University, Beijing 100871, China
2.Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA
3.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China
4.Research School of Astronomy and Astrophysics, Australian National University, Weston Creek, ACT 2611, Australia
5.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
6.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
7.School of Astronomy and Space Science, Sun Yat-Sen University, Guangzhou 510275, China
8.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China
9.Stromlo Fellow.
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).

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来源：云南天文台

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