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An Empirical Template Library of Stellar Spectra for a Wide Range of Spectral Classes, Luminosity Classes, and Metallicities Using SDSS BOSS Spectra

Aurora Y. KesseliBoston University Astronomy Department, 725 Commonwealth Ave., Boston, MA 02215, USAAndrew A. WestBoston University Astronomy Department, 725 Commonwealth Ave., Boston, MA 02215, USAMark VeyetteBoston University Astronomy Department, 725 Commonwealth Ave., Boston, MA 02215, USABrandon HarrisonBoston University Astronomy Department, 725 Commonwealth Ave., Boston, MA 02215, USAD.E. FeldmanBoston University Astronomy Department, 725 Commonwealth Ave., Boston, MA 02215, USAJohn J. BochanskiRider University, 2083 Lawrenceville Rd., Lawrence Township, NJ 08648, USA

2017en

ABI

Annotatsiya

Abstract We present a library of empirical stellar spectra created using spectra from the Sloan Digital Sky Survey’s Baryon Oscillation Spectroscopic Survey. The templates cover spectral types O5 through L3, are binned by metallicity from −2.0 dex through +1.0 dex, and are separated into main-sequence (dwarf) stars and giant stars. With recently developed M dwarf metallicity indicators, we are able to extend the metallicity bins down through the spectral subtype M8, making this the first empirical library with this degree of temperature and metallicity coverage. The wavelength coverage for the templates is from 3650 to 10200 Å at a resolution of better than R ∼ 2000. Using the templates, we identify trends in color space with metallicity and surface gravity, which will be useful for analyzing large data sets from upcoming missions like the Large Synoptic Survey Telescope. Along with the templates, we are releasing a code for automatically (and/or visually) identifying the spectral type and metallicity of a star.

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DOI: 10.3847/1538-4365/aa656d

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