标题： 通过星系团透镜检测和研究高红移星系 显示英文标题

标题： Detection and Study of High-Redshift Galaxies Through Cluster-Lenses

摘要： 我们讨论一种方法，利用质量分布已知的星系团透镜的引力放大效应，构建和研究一个红移范围为2<z<5的遥远星系样本。候选星系通过在高红移处接近临界线，并在大波长范围内进行光度红移估计来选择。与其它方法相比，此过程由于星系团的放大效应约为1个星等，可以减少光度的选择偏差，并且在包含近红外波段时，可以减少对高恒星形成率的选择偏差。本文介绍了并讨论了使用此技术获得的一些新结果。 显示英文摘要

摘要： We discuss a method to build up and study a sample of distant galaxies, with 2<z<5, using the gravitational amplification effect in cluster-lenses for which the mass distribution is well known. The candidates are selected close to the critical lines at high-z, through photometric redshift estimates on a large wavelength range. With respect to other methods, this procedure allows to reduce the selection biases in luminosity, thanks to the cluster magnification of ~1 magnitude, and towards active SFRs when the near-IR domain is included. Some new results obtained with this technique are presented and discussed.