First catalog of strong lens candidates in the COSMOS field
First catalog of strong lens candidates in the COSMOS field
复制标题
DOI：
10.1086/526426
复制
发表时间：
2008-05-01
影响因子：
8.7
通讯作者：
Walcher, Jakob
中科院分区：
文献类型：
--
作者：
Faure, Cecile;Kneib, Jean-Paul;Walcher, Jakob
我们提出了第一个目录中的67强星系星系透镜候选人发现的1.64度（2）哈勃太空望远镜宇宙巡天。这些系统中有20个显示多个图像或强烈弯曲的大弧。我们最初的搜索是通过对数据的目视检查进行的，出于实际考虑，仅限于大规模的早期型透镜星系，其弧半径小于5“。简单的质量模型构造的最佳透镜的候选人，我们的结果进行了比较的SLACS调查和CASTLES数据库的强透镜目录。这些新的强星系-星系透镜系统为研究早期星系的质量分布及其暗物质晕提供了宝贵的样本。我们还希望这个样本在测试自动搜索强引力透镜的软件算法中发挥重要作用。从我们的分析中，一个强大的下限是来自强大的星系星系系统在当前和未来的天基宽视场成像调查的预期发生。我们期望这样的调查应该发现大量的强透镜系统（每平方度超过10个系统），这将允许对星系属性进行详细的统计分析，并可能导致对引力结构形成和宇宙学模型的限制。
We present the first catalog of 67 strong galaxy-galaxy lens candidates discovered in the 1.64 deg(2) Hubble Space Telescope COSMOS survey. Twenty of these systems display multiple images or strongly curved large arcs. Our initial search is performed by visual inspection of the data and is restricted, for practical considerations, to massive early-type lens galaxies with arcs found at radii smaller than similar to 5 ''. Simple mass models are constructed for the best lens candidates, and our results are compared to the strong lensing catalogs of the SLACS survey and the CASTLES database. These new strong galaxy-galaxy lensing systems constitute a valuable sample to study the mass distribution of early-type galaxies and their associated dark matter halos. We further expect this sample to play an important role in the testing of software algorithms designed to automatically search for strong gravitational lenses. From our analysis a robust lower limit is derived for the expected occurrence of strong galaxy-galaxy systems in current and future space-based wide-field imaging surveys. We expect that such surveys should uncover a large number of strong lensing systems (more than 10 systems per square degree), which will allow for a detailed statistical analysis of galaxy properties and will likely lead to constraints on models of gravitational structure formation and cosmology.