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Discovery of six high-redshift quasars with the Lijiang 2.4 m telescope and the Multiple Mirror Telescope
Wu, XB1; Zuo, WW1; Yang, Q1; Yi WM(易卫敏)2; Yang, CW3,4; Liu, WJ3,4; Jiang, P3,4; Shu, XW3,4; Zhou, HY3,4; Wu, XB (reprint author), Peking Univ, Dept Astron, Beijing 100871, Peoples R China.
发表期刊RESEARCH IN ASTRONOMY AND ASTROPHYSICS
2012-09
卷号12期号:9页码:1185-1190
DOI10.1088/1674-4527/12/9/001
产权排序第2完成单位
收录类别SCI
关键词Quasars: General Quasars: Emission Lines Galaxies: Active Galaxies: High-redshift
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.
项目资助者National Natural Science Foundation of China [11033001] ; National Astronomical Observatories, Chinese Academy of Sciences ; Ministry of Finance ; Alfred P. Sloan Foundation ; National Science Foundation ; U.S. Department of Energy ; National Aeronautics and Space Administration ; Japanese Monbukagakusho ; Max Planck Society ; Higher Education Funding Council for England
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN1674-4527
URL查看原文
WOS记录号WOS:000309021900001
WOS研究方向Astronomy & Astrophysics
WOS类目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
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5418
专题丽江天文观测站(南方基地)
通讯作者Wu, XB (reprint author), Peking Univ, Dept Astron, Beijing 100871, Peoples R China.
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
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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.,...&Wu, XB .(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.
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