A new gravitational lens from the MUSCLES survey: ULAS J082016.1+081216

A new gravitational lens from the MUSCLES survey: ULAS J082016.1+081216
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来自 MUSCLES 调查的新型引力透镜:ULAS J082016.1 081216

DOI:
10.1111/j.1365-2966.2009.15198.x
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发表时间:
2009
影响因子:
4.8
通讯作者:
S. University
S. University
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
N. Jackson;E. Ofek;M. O. U. O. Manchester;J. B. C. F. Astrophysics;Caltech;Kipac;S. University

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我们提出了一个新的双图像引力透镜系统,ULAS J082016.1+081216,图像分离2.3和高({approx}6)通量比的观测。该系统是从斯隆数字巡天光谱类星体列表中选择的,使用了UKIRT深空巡天(UKIDSS)的新高质量图像。透镜类星体的源红移为2.024,我们将透镜星系确定为红移为0.803 {+-} 0.001的微弱红色天体。从UKIDSS调查中以同样方式选择的其他三个物体被发现不是透镜系统。与早期使用这种方法发现的透镜一起,SDSS-UKIDSS透镜有可能显着增加在SDSS中发现的类星体透镜的数量,将调查扩展到更高的通量比和更低的分离,并提供更大的完整性,这对统计目的很重要。
We present observations of a new double-image gravitational lens system, ULAS J082016.1+081216, of image separation 2.3 and high ({approx}6) flux ratio. The system is selected from the Sloan Digital Sky Survey spectroscopic quasar list using new high-quality images from the UKIRT Deep Sky Survey (UKIDSS). The lensed quasar has a source redshift of 2.024, and we identify the lens galaxy as a faint red object of redshift 0.803 {+-} 0.001. Three other objects from the UKIDSS survey, selected in the same way, were found not to be lens systems. Together with the earlier lens found using this method, the SDSS-UKIDSS lenses have the potential to significantly increase the number of quasar lenses found in SDSS, to extend the survey to higher flux ratios and lower separations, and to give greater completeness which is important for statistical purposes.
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