文章基本信息

标题：Magellan/M2FS Spectroscopy of Galaxy Clusters: Stellar Population Model and Application to Abell 267
本地全文：下载
作者：Evan Tucker ; Matthew G. Walker ; Mario Mateo 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2017
卷号：154
期号：3
DOI：10.3847/1538-3881/aa8360
语种：English
出版社：American Institute of Physics
摘要：We report the results of a pilot program to use the Magellan/M2FS spectrograph to survey the galactic populations and internal kinematics of galaxy clusters. For this initial study, we present spectroscopic measurements for 223 quiescent galaxies observed along the line of sight of the galaxy cluster Abell 267 (). We develop a Bayesian method for modeling the integrated light from each galaxy as a simple stellar population, with free parameters that specify the redshift (/c) and characteristic age, metallicity (), alpha-abundance (), and internal velocity dispersion () for individual galaxies. Parameter estimates derived from our 1.5 hr observation of A267 have median random errors of , , , , and . In a companion paper, we use these results to model the structure and internal kinematics of A267.
关键词：galaxies: clusters: individual (Abell 267);galaxies: general;techniques: imaging spectroscopy Supporting material: machine-readable table