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A SURVEY OF LUMINOUS HIGH-REDSHIFT QUASARS WITH SDSS AND WISE. I. TARGET SELECTION AND OPTICAL SPECTROSCOPY
Wang, Feige1,2; Wu, Xue-Bing1,3; Fan, Xiaohui2,3; Yang, Jinyi1,2; Yi WM(易卫敏)4,5; Bian, Fuyan6; McGreer, Ian D.2; Yang, Qian1,2; Ai, Yanli7; Dong, Xiaoyi1; Zuo, Wenwen8; Jiang, Linhua3; Green, Richard2; Wang, Shu1; Cai, Zheng2,9; Wang, Ran3; Yue, Minghao1; Wang, FG (reprint author)
发表期刊ASTROPHYSICAL JOURNAL
2016-03-01
卷号819期号:1
DOI10.3847/0004-637X/819/1/24
产权排序第4完成单位
收录类别SCI
关键词Galaxies: Active Galaxies: High-redshift Quasars: Emission Lines Quasars: General
摘要High-redshift quasars are important tracers of structure and evolution in the early universe. However, they are very rare and difficult to find when using color selection because of contamination from late-type dwarfs. High-redshift quasar surveys based on only optical colors suffer from incompleteness and low identification efficiency, especially at z greater than or similar to 4.5. We have developed a new method to select 4.7 less than or similar to z less than or similar to 5.4 quasars with both high efficiency and completeness by combining optical and mid-IR Wide-field Infrared Survey Explorer (WISE) photometric data, and are conducting a luminous z similar to 5 quasar survey in the whole Sloan Digital Sky Survey (SDSS) footprint. We have spectroscopically observed 99 out of 110 candidates with z-band magnitudes brighter than 19.5, and 64 (64.6%) of them are quasars with redshifts of 4.4 less than or similar to z less than or similar to 5.5 and absolute magnitudes of -29 less than or similar to M-1450 less than or similar to -26.4. In addition, we also observed 14 fainter candidates selected with the same criteria and identified 8 (57.1%) of them as quasars with 4.7 < z < 5.4. Among 72 newly identified quasars, 12 of them are at 5.2 < z < 5.7, which leads to an increase of similar to 36% of the number of known quasars at this redshift range. More importantly, our identifications doubled the number of quasars with M1450 < -27.5 at z > 4.5, which will set strong constraints on the bright end of the quasar luminosity function. We also expand our method to select quasars at z greater than or similar to 5.7. In this paper we report the discovery of four new luminous z greater than or similar to 5.7 quasars based on SDSS WISE selection.
项目资助者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) ; program of China Scholarships Council(201406010031) ; US NSF(AST 11-07682) ; Strategic Priority Research Program "The Emergence of Cosmological Structures"(XDB09000000) ; CAS ; People's Government of Yunnan Province ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000372303400024
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]DIGITAL-SKY-SURVEY ; SURVEY COMMISSIONING DATA ; FIELD SPECTROGRAPH WIFES ; SPECTRAL ENERGY-DISTRIBUTIONS ; INFRARED-SURVEY-EXPLORER ; GALAXY EVOLUTION SURVEY ; GREATER-THAN 6 ; DATA RELEASE ; Z-GREATER-THAN-5.7 QUASARS ; ADDITIONAL QUASARS
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9362
专题丽江天文观测站(南方基地)
中国科学院天体结构与演化重点实验室
通讯作者Wang, FG (reprint author)
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.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
5.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
6.Research School of Astronomy and Astrophysics, Australian National University, Weston Creek, ACT 2611, Australia
7.School of Physics and Astronomy, Sun Yat-Sen University, Guangzhou 510275, China
8.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China
9.UCO/Lick Observatory, University of California, 1156 High Street, Santa Cruz, CA 95064, USA Stromlo Fellow
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Wang, Feige,Wu, Xue-Bing,Fan, Xiaohui,et al. A SURVEY OF LUMINOUS HIGH-REDSHIFT QUASARS WITH SDSS AND WISE. I. TARGET SELECTION AND OPTICAL SPECTROSCOPY[J]. ASTROPHYSICAL JOURNAL,2016,819(1).
APA Wang, Feige.,Wu, Xue-Bing.,Fan, Xiaohui.,Yang, Jinyi.,Yi WM.,...&Wang, FG .(2016).A SURVEY OF LUMINOUS HIGH-REDSHIFT QUASARS WITH SDSS AND WISE. I. TARGET SELECTION AND OPTICAL SPECTROSCOPY.ASTROPHYSICAL JOURNAL,819(1).
MLA Wang, Feige,et al."A SURVEY OF LUMINOUS HIGH-REDSHIFT QUASARS WITH SDSS AND WISE. I. TARGET SELECTION AND OPTICAL SPECTROSCOPY".ASTROPHYSICAL JOURNAL 819.1(2016).
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