%0 Journal Article
%T The Sloan Digital Sky Survey Data Release 7 Spectroscopic M Dwarf Catalog I: Data
%A Andrew A. West
%A Dylan P. Morgan
%A John J. Bochanski
%A Jan Marie Andersen
%A Keaton J. Bell
%A Adam F. Kowalski
%A James R. A. Davenport
%A Suzanne L. Hawley
%A Sarah J. Schmidt
%A David Bernat
%A Eric J. Hilton
%A Philip Muirhead
%A Kevin R. Covey
%A Barbara Rojas-Ayala
%A Everett Schlawin
%A Mary Gooding
%A Kyle Schluns
%A Saurav Dhital
%A J. Sebastian Pineda
%A David O. Jones
%J Physics
%D 2011
%I arXiv
%R 10.1088/0004-6256/141/3/97
%X We present a spectroscopic catalog of 70,841 visually inspected M dwarfs from the seventh data release 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 identify a relationship between zeta and the g-r and r-z colors of M dwarfs. We assess the precision of our spectral types (which were assigned by individual examination), review the bulk attributes of the sample, and examine the magnetic activity properties of M dwarfs, in particular those traced by the higher order Balmer transitions. Our catalog is cross-matched to Two Micron All Sky Survey (2MASS) infrared data, and contains photometric distances for each star. Lastly, we identify eight new late-type M dwarfs that are possibly within 25 pc of the Sun. 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.
%U http://arxiv.org/abs/1101.1082v2