The Sloan Digital Sky Survey quasar lens search. II : Statistical lens sample from the third data release
The Sloan Digital Sky Survey quasar lens search. II : Statistical lens sample from the third data release
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斯隆数字巡天类星体镜头搜索。
DOI：
10.1088/0004-6256/135/2/496
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
et al.
中科院分区：
文献类型：
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作者：
N. Inada;et al.
我们报告了斯隆数字巡天（SDSS）发现的五个引力透镜类星体。所有五个系统都是从高红移（z> 2.2）SDSS类星体样本中选择的双像透镜类星体候选者。我们通过额外的成像和光谱观察证实了它们的透镜性质。新系统为SDSS J 0819 + 5356（光源红移z s= 2.237，透镜红移z l= 0.294，图像分离θ= 4 farcs 04），SDSS J1254+ 2235（z s= 3.626，θ= 1 farcs 56）、SDSS J1258+ 1657（z s= 2.702，θ= 1 farcs 28）、SDSS J1339+ 1310（z s= 2.243，θ= 1 farcs 69）和SDSS J1400+ 3134（z s= 3.317，θ= 1 farcs 74）。我们从透镜星系的颜色和星等估计后四个系统的透镜红移为zl = 0.2-0.8。我们发现，所有系统的图像配置是很好地再现了标准的质量模型。虽然这些透镜将不包括在我们的z s< 2.2透镜的统计样本中，但它们扩大了可用于高红移星系和类星体研究的透镜类星体的数量。
We report the discovery of five gravitationally lensed quasars from the Sloan Digital Sky Survey (SDSS). All five systems are selected as two-image lensed quasar candidates from a sample of high-redshift (z> 2.2) SDSS quasars. We confirmed their lensing nature with additional imaging and spectroscopic observations. The new systems are SDSS J0819+ 5356 (source redshift z s= 2.237, lens redshift z l= 0.294, and image separation θ= 4 farcs 04), SDSS J1254+ 2235 (z s= 3.626, θ= 1 farcs 56), SDSS J1258+ 1657 (z s= 2.702, θ= 1 farcs 28), SDSS J1339+ 1310 (z s= 2.243, θ= 1 farcs 69), and SDSS J1400+ 3134 (z s= 3.317, θ= 1 farcs 74). We estimate the lens redshifts of the latter four systems to be z l= 0.2–0.8 from the colors and magnitudes of the lensing galaxies. We find that the image configurations of all systems are well reproduced by standard mass models. Although these lenses will not be included in our statistical sample of z s< 2.2 lenses, they expand the number of lensed quasars which can be used for high-redshift galaxy and quasar studies.