The Search for Galaxy Clustering around a Quasar Pair at z = 4.25 Found in the Sloan Digital Sky Survey
The Search for Galaxy Clustering around a Quasar Pair at z = 4.25 Found in the Sloan Digital Sky Survey
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DOI：
10.1086/383222
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发表时间：
2003-12
期刊：
影响因子：
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通讯作者：
M. Fukugita;O. Nakamura;D. Schneider;M. Doi;N. Kashikawa
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文献类型：
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作者：
M. Fukugita;O. Nakamura;D. Schneider;M. Doi;N. Kashikawa
本文研究了一对Z = 4.25的明亮类星体SDSS J1439- 0034 A和B的环境（半径为10600 kpc），它们相距33“。对类星体的高质量斯巴鲁光谱的分析表明，这种配置确实是一个物理对，而不是一个引力透镜;红移略有不同（尽管勉强一致），两个光谱具有惊人的不同特征。我们利用V dropout技术和半窄带成像寻找具有类似红移的亮星系（L <$0.4L *），寻找强Lyα发射。我们没有发现类星体对周围星系密度的增强;它的环境与一般领域的差异很小，密度增强的上限约为3.5，置信度为90%。我们推断明亮的类星体是在一般场中的两个正常星系中偶然出现的。
We present an investigation of the environment (≈600 kpc radius) of a pair of luminous z = 4.25 quasars, SDSS J1439-0034A and B, separated by 33''. An analysis of high-quality Subaru spectra of the quasars suggests that this configuration is indeed a physical pair and not a gravitational lens; the redshifts are slightly different (although marginally consistent with being the same), and the two spectra have strikingly different features. We search for bright galaxies (L ≳ 0.4L*) having similar redshifts using the V dropout technique and semi-narrowband imaging looking for strong Lyα emission. We find no enhancement in the galaxy density around the quasar pair; its environment differs very little from a general field, with the upper limit of the density enhancement being about 3.5 at a 90% confidence. We infer that bright quasars happened to appear in two normal galaxies in a general field.