期刊
ASTRONOMICAL JOURNAL
卷 126, 期 5, 页码 2268-2280出版社
IOP PUBLISHING LTD
DOI: 10.1086/378959
关键词
galaxies : distances and redshifts; galaxies : elliptical and lenticular, cD; galaxies : general; large-scale structure of universe; surveys; techniques : spectroscopic
We present central velocity dispersions and Mg-2 line indices for an all-sky sample of similar to1178 elliptical and S0 galaxies, of which 984 had no previous measures. This sample contains the largest set of homogeneous spectroscopic data for a uniform sample of elliptical galaxies in the nearby universe. These galaxies were observed as part of the ENEAR project, designed to study the peculiar motions and internal properties of the local early-type galaxies. Using 523 repeated observations of 317 galaxies obtained during different runs, the data are brought to a common zero point. These multiple observations, taken during the many runs and different instrumental setups employed for this project, are used to derive statistical corrections to the data and are found to be relatively small, typically less than or similar to5% of the velocity dispersion and 0.01 mag in the Mg-2 line strength. Typical errors are about 8% in velocity dispersion and 0.01 mag in Mg-2, in good agreement with values published elsewhere.
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