标题： 光度选择的一个大星系目录与$z\geq0.55$ 显示英文标题

标题： Photometric Selection of a Massive Galaxy Catalog with $z\geq0.55$

摘要： 我们介绍了光度选定的大量星系目录的开发，目标是红移处的明亮红星系（LRGs）和大质量蓝星系$z\geq 0.55$。 使用红外/光学颜色-颜色切割选择大质量星系候选者，其中光学数据来自斯隆数字天空调查（SDSS），红外数据来自从广域红外线巡天探测器（WISE）推导出的“unWISE”强制测光。 该选择方法基于之前开发的用于选择LRGs的技术$z>0.5$，并使用接收者操作特征（ROC）曲线进行优化。 该目录包含16,191,145个天体，覆盖整个SDSS DR10足迹。 通过DEEP2星系红移调查的光谱红移和COSMOS的光度红移估计了最终目录的红移分布。 使用DEEP2的静止框架$U-B$颜色来估计LRG选择效率。 使用DEEP2，最终目录的平均红移为$z=0.65$，标准差为$\sigma = 2.0$，平均静止框架$U-B=1.0$，标准差为$\sigma=0.27$。 使用COSMOS，得到的星表平均红移为$z=0.60$，标准差为$\sigma = 1.8$。 我们估计星表中有34%为蓝星系，其值为$z\geq0.55$。 估计选定的天体中有9.6%为蓝源，红移为$z<0.55$。 恒星污染估计为1.8%。 显示英文摘要

摘要： We present the development of a photometrically selected massive galaxy catalog, targeting Luminous Red Galaxies (LRGs) and massive blue galaxies at redshifts $z\geq 0.55$. Massive galaxy candidates are selected using infrared/optical color-color cuts, with optical data from Sloan Digital Sky Survey (SDSS) and infrared data from "unWISE" forced photometry derived from the Wide-field Infrared Survey Explorer (WISE). The selection method is based on previously developed techniques to select LRGs with $z>0.5$, and is optimized using receiver operating characteristic (ROC) curves. The catalog contains 16,191,145 objects, selected over the full SDSS DR10 footprint. The redshift distribution of the resulting catalog is estimated using spectroscopic redshifts from the DEEP2 Galaxy Redshift Survey and photometric redshifts from COSMOS. Restframe $U-B$ colors from DEEP2 are used to estimate LRG selection efficiency. Using DEEP2, the resulting catalog has average redshift $z=0.65$, with standard deviation $\sigma = 2.0$, and average restframe $U-B=1.0$, with standard deviation $\sigma=0.27$. Using COSMOS, the resulting catalog has average redshift $z=0.60$, with standard deviation $\sigma = 1.8$. We estimate 34% of the catalog to be blue galaxies with $z\geq0.55$. An estimated 9.6% of selected objects are blue sources with redshift $z<0.55$. Stellar contamination is estimated to be 1.8%.