The Sloan Digital Sky Survey quasar lens search. IV : Statistical lens sample from the fifth data release
The Sloan Digital Sky Survey quasar lens search. IV : Statistical lens sample from the fifth data release
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斯隆数字巡天类星体镜头搜索。
DOI：
10.1088/0004-6256/140/2/403
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发表时间：
2010
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通讯作者：
P
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作者：
N. Inada;M. Oguri;M. S. Shin;I. Kayo;M. A. Strauss;J. F. Hannawi;T. Morokuma;R. H. Becker;R. L. White;C. S. Kochanek;M. D. Gregg;K. Chiu;D. E. Johnston;A. Clocchiatti;G. T. Richards;D. P. Schneider;J. A. Frieman;M. Fukugita;R. J. Gott;P
我们给出了我们从斯隆数字巡天(SDSS)的数据中系统地寻找强透镜类星体的第二份报告。从对136个候选天体的广泛跟踪观察中，我们在SDSS数据发布5中发现了77,429个光谱确认类星体的完整样本中的36个透镜。然后，我们从36,287个红移范围为0.6<；z<；2.2的类星体样本中定义了19个透镜的完整样本，其中包括我们之前在SDSS数据发布3中搜索的11个透镜，其中我们要求这些透镜的图像间隔为1‘<；θ<；20’‘，两幅图像之间的I波段幅度差小于1.25mag。在19个透镜类星体中，3个具有四重图像构型，其余16个呈现双图像。此透镜样本将宇宙常数限制为ΩΛ=0.84+0.06−0.08(统计)+0.09−0.07(系统.)假设宇宙是平坦的，这与其他宇宙学观测很好地一致。我们还报告了七个双星类星体的发现，它们的间隔从1个FARCS 1到16个FARC 6，这些都是在我们的透镜测量过程中发现的。这项研究结束了我们在完整的SDSS-I数据集上的统计透镜样本的构建。
We present the second report of our systematic search for strongly lensed quasars from the data of the Sloan Digital Sky Survey (SDSS). From extensive follow-up observations of 136 candidate objects, we find 36 lenses in the full sample of 77,429 spectroscopically confirmed quasars in the SDSS Data Release 5. We then define a complete sample of 19 lenses, including 11 from our previous search in the SDSS Data Release 3, from the sample of 36,287 quasars with i< 19.1 in the redshift range 0.6< z< 2.2, where we require the lenses to have image separations of 1''< θ< 20''and i-band magnitude differences between the two images smaller than 1.25 mag. Among the 19 lensed quasars, three have quadruple-image configurations, while the remaining 16 show double images. This lens sample constrains the cosmological constant to be Ω Λ= 0.84+ 0.06− 0.08 (stat.)+ 0.09− 0.07 (syst.) assuming a flat universe, which is in good agreement with other cosmological observations. We also report the discoveries of seven binary quasars with separations ranging from 1 farcs 1 to 16 farcs 6, which are identified in the course of our lens survey. This study concludes the construction of our statistical lens sample in the full SDSS-I data set.