斯隆数字巡天数据发布7 M矮星光谱星表
The Sloan Digital Sky Survey Data Release 7 M Dwarf Spectroscopic Catalog
摘要：
我们提出了一个光谱目录70,841目视检查M矮星从斯隆数字巡天（SDSS）的第七次数据发布（DR 7）。对于每个光谱，我们提供测量的光谱类型，一些分子bandheads，和H-α，H-β，H-γ，H-δ和钙II K发射线。此外，我们还计算了样本中大多数恒星的金属敏感参数zeta和3D空间运动。我们的星表与2微米全天巡天（2 MASS）红外数据交叉匹配，并包含每个恒星的光度距离。未来的研究将使用这些数据来彻底研究晚型M矮星的磁活动和运动学，并研究当地银河系的化学和动力学历史。
英文摘要：
We present a spectroscopic catalog of 70,841 visually inspected M dwarfs from the seventh data release (DR7) of the Sloan Digital Sky Survey (SDSS). For each spectrum, we provide measurements of the spectral type, a number of molecular bandheads, and the H-alpha, H-beta, H-gamma, H-delta and Ca II K emission lines. In addition, we calculate the metallicity-sensitive parameter zeta and 3D space motions for most of the stars in the sample. Our catalog is cross-matched to Two Micron All Sky Survey (2MASS) infrared data, and contains photometric distances for each star. Future studies will use these data to thoroughly examine magnetic activity and kinematics in late-type M dwarfs and examine the chemical and dynamical history of the local Milky Way.
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