干旱区生态环境知识资源中心(Arid): A very bright (i = 16.44) quasar in the 'redshift desert' discovered by the Guoshoujing Telescope (LAMOST)

Arid

DOI	10.1088/1674-4527/10/8/003
	A very bright (i = 16.44) quasar in the 'redshift desert' discovered by the Guoshoujing Telescope (LAMOST)
	Wu Xuebing; Chen Zhaoyu; Jia Zhendong; Zuo Wenwen; Zhao Yongheng; Luo Ali; Bai Zhongrui; Chen Jianjun; Zhang Haotong; Yan Hongliang; Ren Juanjuan; Sun Shiwei; Hong Wu; Yong Zhang; Li Yeping; Lu Qishuai; You Wang; Ni Jijun; Hai Wang; Xu Kong; Shen Shiyin
来源期刊	Research in Astronomy and Astrophysics
ISSN	1674-4527
出版年	2010
卷号	10 期号:8 页码:737-744
英文摘要	The redshift range from 2.2 to 3 is known as the 'redshift desert' of quasars because quasars with redshifts in this range have similar optical colors as normal stars and are thus difficult to find in optical sky surveys. A quasar candidate, SDSS J085543.40-001517.7, which was selected by a recently proposed criterion involving near-IR Y - K and optical g - z colors, was identified spectroscopically as a new quasar with a redshift of 2.427 by the Guoshoujing Telescope (LAMOST) commissioning observation in 2009 December and confirmed by the observation made with the NAOC/Xinglong 2.16m telescope in 2010 March. This quasar was not identified in the SDSS spectroscopic survey. Comparing with other SDSS quasars, we found that this new quasar, with an i magnitude of 16.44, is apparently the brightest one in the redshift range from 2.3 to 2.7. From its spectral properties, we derived its central black hole mass to be (1.4 ~ 3.9) x 10~(10) M⊙ and its bolometric luminosity to be 3.7 x 10~(48) erg s~(-1), which indicates that this new quasar is intrinsically very bright and belongs to the class of the most luminous quasars in the universe. Our identification supports the notion that quasars in the redshift desert can be found by the quasar selection criterion involving the near-IR colors. More missing quasars are expected to be uncovered by future LAMOST spectroscopic surveys, which is important to the study of the cosmological evolution of quasars at redshifts higher than 2.2
英文关键词	quasars general - quasars emission lines - galaxies active
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Astronomy & Astrophysics
CSCD记录号	CSCD:3971814
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335067
作者单位	Wu Xuebing, Department of Astronomy, Peking University, Beijing 100871, China.; Chen Zhaoyu, Department of Astronomy, Peking University, Beijing 100871, China.; Jia Zhendong, Department of Astronomy, Peking University, Beijing 100871, China.; Zuo Wenwen, Department of Astronomy, Peking University, Beijing 100871, China.; Zhao Yongheng, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China.; Luo Ali, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China.; Bai Zhongrui, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China.; Chen Jianjun, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China.; Zhang Haotong, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China.; Yan Hongliang, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China.; Ren Juanjuan, National Astronomical Observatories, Chinese Academy of Scien...
推荐引用方式 GB/T 7714	Wu Xuebing,Chen Zhaoyu,Jia Zhendong,et al. A very bright (i = 16.44) quasar in the 'redshift desert' discovered by the Guoshoujing Telescope (LAMOST)[J],2010,10(8):737-744.
APA	Wu Xuebing.,Chen Zhaoyu.,Jia Zhendong.,Zuo Wenwen.,Zhao Yongheng.,...&Shen Shiyin.(2010).A very bright (i = 16.44) quasar in the 'redshift desert' discovered by the Guoshoujing Telescope (LAMOST).Research in Astronomy and Astrophysics,10(8),737-744.
MLA	Wu Xuebing,et al."A very bright (i = 16.44) quasar in the 'redshift desert' discovered by the Guoshoujing Telescope (LAMOST)".Research in Astronomy and Astrophysics 10.8(2010):737-744.