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arXiv 0812.3934astro-ph
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斯隆亮弧巡天:z=0.4-1.4的六个强透镜星系

The Sloan Bright Arcs Survey : Six Strongly Lensed Galaxies at z=0.4-1.4

Jeffrey M. Kubo, Sahar S. Allam, James Annis, Elizabeth J. Buckley-Geer, H. Thomas Diehl, Donna Kubik, Huan Lin, Douglas Tucker

摘要:

我们提出了新的结果,我们的计划,系统地寻找强透镜星系的斯隆数字巡天(SDSS)成像数据。在这项研究中,提出了六个强透镜系统,我们已经证实了后续的光谱和成像使用的3.5米望远镜在阿帕奇点天文台。初步的质量模型表明,透镜是群尺度的系统,在z=0.17-0.45时速度色散范围为466-878 km s^{-1},是z=0.4-1.4时的强透镜源星系。星系群是一个相对较新的质量尺度,刚刚开始用强透镜探测。我们的晶状体样本大约是SDSS中确认的组规模晶状体数量的两倍,并补充了其他成像调查(如CFHTLS)中正在进行的强晶状体检索(Cabanac等人,2007)。由于我们的弧是在SDSS成像数据中发现的,它们都是明亮的($r\lesssim22$),使它们非常适合详细的随访研究。

英文摘要:

We present new results of our program to systematically search for strongly lensed galaxies in the Sloan Digital Sky Survey (SDSS) imaging data. In this study six strong lens systems are presented which we have confirmed with follow-up spectroscopy and imaging using the 3.5m telescope at the Apache Point Observatory. Preliminary mass models indicate that the lenses are group-scale systems with velocity dispersions ranging from 466-878 km s^{-1} at z=0.17-0.45 which are strongly lensing source galaxies at z=0.4-1.4. Galaxy groups are a relatively new mass scale just beginning to be probed with strong lensing. Our sample of lenses roughly doubles the confirmed number of group-scale lenses in the SDSS and complements ongoing strong lens searches in other imaging surveys such as the CFHTLS (Cabanac et al 2007). As our arcs were discovered in the SDSS imaging data they are all bright ($r\lesssim22$), making them ideally suited for detailed follow-up studies.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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