The Sloan Digital Sky Survey Data Release 7 Spectroscopic M Dwarf Catalog I: Data
Abstract
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.
Keywords
Cite
@article{arxiv.1101.1082,
title = {The Sloan Digital Sky Survey Data Release 7 Spectroscopic M Dwarf Catalog I: Data},
author = {Andrew A. West and Dylan P. Morgan and John J. Bochanski and Jan Marie Andersen and Keaton J. Bell and Adam F. Kowalski and James R. A. Davenport and Suzanne L. Hawley and Sarah J. Schmidt and David Bernat and Eric J. Hilton and Philip Muirhead and Kevin R. Covey and Barbara Rojas-Ayala and Everett Schlawin and Mary Gooding and Kyle Schluns and Saurav Dhital and J. Sebastian Pineda and David O. Jones},
journal= {arXiv preprint arXiv:1101.1082},
year = {2015}
}
Comments
14 pages, 10 figures, 5 tables (in emulateapj format), accepted for publication in the Astronomical Journal