averybrighti1644quasarintheredshiftdesertdiscoveredbytheguoshoujingtelescopelamost
文献类型：期刊论文
| 作者 | Shen Shiyin5; Wu Xuebing4; Chen Zhaoyu4; Jia Zhendong4; Zuo Wenwen4; Zhao Yongheng3 ; Luo Ali3; Bai Zhongrui3; Chen Jianjun3; Zhang Haotong3
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| 刊名 | researchinastronomyandastrophysics
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| 出版日期 | 2010 |
| 卷号 | 10期号:8页码:737 |
| ISSN号 | 1674-4527 |
| 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 |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/41127]  |
| 专题 | 光学部_LAMOST运行和发展中心 |
| 作者单位 | 1.Center for Astrophysics, University of Science & Technology of China 2.中国科学院 3.中国科学院国家天文台 4.北京大学 5.中国科学院上海天文台 |
| 推荐引用方式 GB/T 7714 | Shen Shiyin,Wu Xuebing,Chen Zhaoyu,et al. averybrighti1644quasarintheredshiftdesertdiscoveredbytheguoshoujingtelescopelamost[J]. researchinastronomyandastrophysics,2010,10(8):737. |
| APA | Shen Shiyin.,Wu Xuebing.,Chen Zhaoyu.,Jia Zhendong.,Zuo Wenwen.,...&Xu Kong.(2010).averybrighti1644quasarintheredshiftdesertdiscoveredbytheguoshoujingtelescopelamost.researchinastronomyandastrophysics,10(8),737. |
| MLA | Shen Shiyin,et al."averybrighti1644quasarintheredshiftdesertdiscoveredbytheguoshoujingtelescopelamost".researchinastronomyandastrophysics 10.8(2010):737. |
入库方式： OAI收割
来源：国家天文台
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