Discovery of six high-redshift quasars with the Lijiang 2.4 m telescope and the Multiple Mirror Telescope

CORC > 云南天文台 > 中国科学院云南天文台 > 丽江天文观测站（南方基地）

	Discovery of six high-redshift quasars with the Lijiang 2.4 m telescope and the Multiple Mirror Telescope
	Wu, XB 1; Zuo, WW 1; Yang, Q 1; Yi WM(易卫敏)2 ; Yang, CW 3,4; Liu, WJ3,4 ; Jiang, P 3,4; Shu, XW 3,4; Zhou, HY 3,4
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2012-09
卷号	12 期号:9 页码:1185-1190
关键词	quasars: general quasars: emission lines galaxies: active galaxies: high-redshift
ISSN号	1674-4527
通讯作者	Wu, XB (reprint author), Peking Univ, Dept Astron, Beijing 100871, Peoples R China.
产权排序	第二完成单位
英文摘要	Quasars with redshifts greater than 4 are rare, and can be used to probe the structure and evolution of the early universe. Here we report the discovery of six new quasars with i-band magnitudes brighter than 19.5 and redshifts between 2.4 and 4.6 from spectroscopy with the Yunnan Faint Object Spectrograph and Camera (YFOSC) at the Lijiang 2.4 m telescope in February, 2012. These quasars are in the list of z > 3.6 quasar candidates selected by using our proposed J - K/i - Y criterion and the photometric redshift estimations from the SDSS optical and UKIDSS near-IR photometric data. Nine candidates were observed by YFOSC, and five among six new quasars were identified as z > 3.6 quasars. One of the other three objects was identified as a star and the other two were unidentified due to the lower signal-to-noise ratio of their spectra. This is the first time that z > 4 quasars have been discovered using a telescope in China. Thanks to the Chinese Telescope Access Program (TAP), the redshift of 4.6 for one of these quasars was confirmed by the Multiple Mirror Telescope (MMT) Red Channel spectroscopy. The continuum and emission line properties of these six quasars, as well as their central black hole masses and Eddington ratios, were obtained.
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 ; EMISSION-LINE PROPERTIES ; CENTRAL BLACK-HOLE ; DATA RELEASE ; LUMINOSITY FUNCTION ; CANDIDATE SELECTION ; LAMOST ; CATALOG ; COLORS ; UKIDSS
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/1674-4527/12/9/001/meta
语种	英语
WOS记录号	WOS:000309021900001
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5418]
专题	云南天文台_丽江天文观测站（南方基地）
作者单位	1.Department of Astronomy, Peking University, Beijing 100871, China 2.National Astronomical Observatories/Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, China 3.Key Laboratory for Research in Galaxies and Cosmology, The University of Science and Technology of China, Chinese Academy of Sciences, Hefei 230026, China 4.Polar Research Institute of China, Shanghai 200136, China
推荐引用方式 GB/T 7714	Wu, XB,Zuo, WW,Yang, Q,et al. Discovery of six high-redshift quasars with the Lijiang 2.4 m telescope and the Multiple Mirror Telescope[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2012,12(9):1185-1190.
APA	Wu, XB.,Zuo, WW.,Yang, Q.,Yi WM.,Yang, CW.,...&Zhou, HY.(2012).Discovery of six high-redshift quasars with the Lijiang 2.4 m telescope and the Multiple Mirror Telescope.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,12(9),1185-1190.
MLA	Wu, XB,et al."Discovery of six high-redshift quasars with the Lijiang 2.4 m telescope and the Multiple Mirror Telescope".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 12.9(2012):1185-1190.