期刊
ASTROPHYSICAL JOURNAL
卷 678, 期 1, 页码 144-153出版社
UNIV CHICAGO PRESS
DOI: 10.1086/529127
关键词
catalogs; galaxies : distances and redshifts; techniques : photometric
Traditional photometric redshift methods use only color information about the objects in question to estimate their redshifts. This paper introduces a new method utilizing colors, luminosity, surface brightness, and radial light profile to measure the redshifts of galaxies in the SloanDigital Sky Survey ( SDSS). We take a statistical approach: distributions of galaxies from the SDSS large- scale structure ( LSS; spectroscopic) sample are constructed at a range of redshifts, and target galaxies are compared to these distributions. An adaptive mesh is implemented to increase the percentage of the parameter space populated by the LSS galaxies. We test the method on a subset of galaxies from the LSS sample, yielding rms Delta z of 0.025 for red galaxies and 0.030 for blue galaxies ( all with z < 0: 25). Possible future improvements to this promising technique are described, as is our ongoing work to extend the method to galaxies at higher redshift.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据