Discovery of 16 New z similar to 5.5 Quasars: Filling in the Redshift Gap of Quasar Color Selection

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	Discovery of 16 New z similar to 5.5 Quasars: Filling in the Redshift Gap of Quasar Color Selection
	Yang, Jinyi 1,2,3; Fan, Xiaohui 2,3; Wu, Xue-Bing 1,2; Wang, Feige 1,2,3; Bian, Fuyan 4,9; Yang, Qian 1,2; McGreer, Ian D.3; Yi WM(易卫敏)5,6 ; Jiang, Linhua 2; Green, Richard 3
刊名	ASTRONOMICAL JOURNAL
	2017-04-01
卷号	153 期号:4
关键词	galaxies: active galaxies: high-redshift quasars: emission lines quasars: general
ISSN号	0004-6256
通讯作者	Yang, Jinyi(Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China)
产权排序	第5完成单位
英文摘要	We present initial results from the first systematic survey of luminous z similar to 5.5 quasars. Quasars at z similar to 5.5, the post-reionization epoch, are crucial tools to explore the evolution of intergalactic medium, quasar evolution, and the early super-massive black hole growth. However, it has been very challenging to select quasars at redshifts 5.3 <= z <= 5.7 using conventional color selections, due to their similar optical colors to late-type stars, especially M dwarfs, resulting in a glaring redshift gap in quasar redshift distributions. We develop a new selection technique for z similar to 5.5 quasars based on optical, near-IR, and mid-IR photometric data from Sloan Digital Sky Survey (SDSS), UKIRT InfraRed Deep Sky Surveys-Large Area Survey (ULAS), VISTA Hemisphere Survey (VHS), and Wide Field Infrared Survey Explorer. From our pilot observations in the SDSS-ULAS/VHS area, we have discovered 15 new quasars at 5.3. z. 5.7 and 6 new lower redshift quasars, with SDSS z band magnitude brighter than 20.5. Including other two z similar to 5.5 quasars already published in our previous work, we now construct a uniform quasar sample at 5.3 <= z <= 5.7, with 17 quasars in a similar to 4800 square degree survey area. For further application in a larger survey area, we apply our selection pipeline to do a test selection by using the new wide field J-band photometric data from a preliminary version of the UKIRT Hemisphere Survey (UHS). We successfully discover the first UHS selected z similar to 5.5 quasar.
学科主题	天文学
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 ; FIELD SPECTROGRAPH WIFES ; INFRARED-SURVEY-EXPLORER ; BLACK-HOLE MASS ; LUMINOSITY FUNCTION ; DATA REDUCTION ; SURVEY UKIDSS ; DATA RELEASE ; SPECTRA ; SAMPLE
收录类别	SCI
原文出处	http://stacks.iop.org/1538-3881/153/i=4/a=184?key=crossref.64cb96f86d6f6cd66905d1ad39594556
语种	英语
WOS记录号	WOS:000398263900002
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/10013]
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.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China 3.Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA 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.Lehigh University, 27 Memorial Drive West, Bethlehem, PA 18015, USA 7.School of Physics and Astronomy, Nottingham University, University Park, Nottingham, NG7 2RD, UK 8.Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ, UK 9.Stromlo Fellow
推荐引用方式 GB/T 7714	Yang, Jinyi,Fan, Xiaohui,Wu, Xue-Bing,et al. Discovery of 16 New z similar to 5.5 Quasars: Filling in the Redshift Gap of Quasar Color Selection[J]. ASTRONOMICAL JOURNAL,2017,153(4).
APA	Yang, Jinyi.,Fan, Xiaohui.,Wu, Xue-Bing.,Wang, Feige.,Bian, Fuyan.,...&Stromlo Fellow..(2017).Discovery of 16 New z similar to 5.5 Quasars: Filling in the Redshift Gap of Quasar Color Selection.ASTRONOMICAL JOURNAL,153(4).
MLA	Yang, Jinyi,et al."Discovery of 16 New z similar to 5.5 Quasars: Filling in the Redshift Gap of Quasar Color Selection".ASTRONOMICAL JOURNAL 153.4(2017).