BINARY QUASARS AT HIGH REDSHIFT. I. 24 NEW QUASAR PAIRS AT z ∼ 3–4
BINARY QUASARS AT HIGH REDSHIFT. I. 24 NEW QUASAR PAIRS AT z ∼ 3–4
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DOI：
10.1088/0004-637x/719/2/1672
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发表时间：
2009-08
期刊：
影响因子：
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通讯作者：
J. Hennawi;A. Myers;Yue Shen;M. Strauss;S. Djorgovski;Xiaohui Fan;E. Glikman;A. Mahabal;C. Martin;G. Richards;D. Schneider;F. Shankar
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文献类型：
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作者：
J. Hennawi;A. Myers;Yue Shen;M. Strauss;S. Djorgovski;Xiaohui Fan;E. Glikman;A. Mahabal;C. Martin;G. Richards;D. Schneider;F. Shankar
类星体在小尺度上的聚集对类星体演化模型和超大质量黑洞的形成产生了基本的限制。本文描述了首次发现高红移双星类星体的系统观测。使用颜色选择和光度红移技术，我们搜索了8142度2的斯隆数字巡天成像数据的二元类星体候选者，并证实了他们与后续光谱。我们的样本27高红移双星（其中24个新发现）在红移2.9 3.5。我们定义良好的选择算法的完整性和效率量化使用模拟光度，我们发现，我们的样本是50%完成。我们的配套论文利用这些知识首次测量了高红移类星体的小尺度成簇（R < 1 h−1 Mpc同动）。高红移双星构成了两个极端（M <$109 M返）超大质量黑洞的指数罕见的巧合。在z = 4时，每10 Gpc 3大约有一个近距离双星，因此这些可能是早期宇宙中最高的sigma峰值，类似于超星系团。
The clustering of quasars on small scales yields fundamental constraints on models of quasar evolution and the buildup of supermassive black holes. This paper describes the first systematic survey to discover high-redshift binary quasars. Using color-selection and photometric redshift techniques, we searched 8142 deg2 of Sloan Digital Sky Survey imaging data for binary quasar candidates, and confirmed them with follow-up spectroscopy. Our sample of 27 high-redshift binaries (24 of them new discoveries) at redshifts 2.9 3.5. The completeness and efficiency of our well-defined selection algorithm are quantified using simulated photometry and we find that our sample is ∼50% complete. Our companion paper uses this knowledge to make the first measurement of the small-scale clustering (R < 1 h−1 Mpc comoving) of high-redshift quasars. High-redshift binaries constitute exponentially rare coincidences of two extreme (M ≳ 109 M☉) supermassive black holes. At z ∼ 4, there is about one close binary per 10 Gpc3, thus these could be the highest sigma peaks, the analogs of superclusters, in the early universe.