文献类型： 外文期刊
第一作者： Zheng, Hongwen
作者： Zheng, Hongwen;Zhang, Yanxia
作者机构：
关键词： techniques: photometric;galaxies: distances and redshifts;galaxies: photometry;cosmology: observations;methods: dataanalysis
期刊名称：SOFTWARE AND CYBERINFRASTRUCTURE FOR ASTRONOMY II
ISSN： 0277-786X
年卷期： 2012 年 8451 卷
页码：
收录情况： SCI
摘要： A photometric redshift provides an estimate for the distance of an astronomical object, such as a galaxy or quasar, which is a powerful statistical tool for studies of evolutionary properties of galaxies, in particular of faint galaxies, since their spectroscopic data are hard or impossible to obtain. At present, there are amounts of methods to estimate photometric redshifts of galaxies and quasars. These methods are grouped into two kinds: template fitting methods and empirical methods. The commonly used techniques about these two kinds are narrated. The difference of approaches between quasars and galaxies are pointed out. The methods show superiorities in galaxies and maybe show poor performance in quasars. Template-fitting methods and empirical methods have their pros and cons.
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