SDSS-IV MaStar: Theoretical atmospheric parameters for the MaNGA stellar library
Por:
Hill L., Thomas D., Maraston C., Yan R., Neumann J., Lundgren A., Lazarz D., Chen Y.-P., Cappellari M., Holtzman J.A., Imig J., Cunha K., Stringfellow G., Bizyaev D., Law D.R., Stassun K.G., Drory N., Merrifield M., Beers T.C.
Publicada:
1 ene 2022
Resumen:
We calculate the fundamental stellar parameters effective temperature, surface gravity, and iron abundance - Teff, log g, [Fe/H] - for the final release of the Mapping Nearby Galaxies at APO (MaNGA) Stellar Library (MaStar), containing 59 266 per-visit-spectra for 24 290 unique stars at intermediate resolution (R ~1800) and high S/N (median = 96). We fit theoretical spectra from model atmospheres by both MARCS and BOSZ-ATLAS9 to the observed MaStar spectra, using the full spectral fitting code pPXF. We further employ a Bayesian approach, using a Markov Chain Monte Carlo (MCMC) technique to map the parameter space and obtain uncertainties. Originally in this paper, we cross match MaStar observations with Gaia photometry, which enable us to set reliable priors and identify outliers according to stellar evolution. In parallel to the parameter determination, we calculate corresponding stellar population models to test the reliability of the parameters for each stellar evolutionary phase. We further assess our procedure by determining parameters for standard stars such as the Sun and Vega and by comparing our parameters with those determined in the literature from high-resolution spectroscopy (APOGEE and SEGUE) and from lower resolution matching template (LAMOST). The comparisons, considering the different methodologies and S/N of the literature surveys, are favourable in all cases. Our final parameter catalogue for MaStar cover the following ranges: 2592 = Teff = 32 983 K; -0.7 = log g = 5.4 dex; -2.9 = [Fe/H] = 1.0 dex and will be available with the last SDSS-IV Data Release, in 2021 December. © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.
Filiaciones:
Hill L.:
Institute of Cosmology and Gravitation, University of Portsmouth, Burnaby Road, Portsmouth, PO1 3FX, United Kingdom
Thomas D.:
Institute of Cosmology and Gravitation, University of Portsmouth, Burnaby Road, Portsmouth, PO1 3FX, United Kingdom
School of Mathematics and Physics, University of Portsmouth, Lion Gate Building, Portsmouth, PO1 3HF, United Kingdom
Maraston C.:
Institute of Cosmology and Gravitation, University of Portsmouth, Burnaby Road, Portsmouth, PO1 3FX, United Kingdom
Yan R.:
Institute of Cosmology and Gravitation, University of Portsmouth, Burnaby Road, Portsmouth, PO1 3FX, United Kingdom
Neumann J.:
Institute of Cosmology and Gravitation, University of Portsmouth, Burnaby Road, Portsmouth, PO1 3FX, United Kingdom
Lundgren A.:
Institute of Cosmology and Gravitation, University of Portsmouth, Burnaby Road, Portsmouth, PO1 3FX, United Kingdom
Lazarz D.:
Department of Physics and Astronomy, University of Kentucky, 505 Rose Street, Lexington, KY 40506-0055, United States
Chen Y.-P.:
Center for Astro, Particle and Planetary Physics, New York University Abu Dhabi, P.O. Box 129188, Abu Dhabi, United Arab Emirates
Cappellari M.:
Sub-department of Astrophysics, Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, United Kingdom
Holtzman J.A.:
Department of Astronomy, New Mexico State University, Las Cruces, NM 88003, United States
Imig J.:
Department of Astronomy, New Mexico State University, Las Cruces, NM 88003, United States
Cunha K.:
Observatório Nacional/MCTIC, R. Gen. José Cristino, 77, Rio de Janeiro, 20921-400, Brazil
Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721-0065, United States
Stringfellow G.:
Center for Astrophysics and Space Astronomy, Department of Astrophysical and Planetary Sciences, University of Colorado, 389 UCB, Boulder, CO 80309-0389, United States
Bizyaev D.:
Apache Point Observatory and New Mexico State University, P.O. Box 59, Sunspot, NM 88349, United States
Sternberg Astronomical Institute, Moscow State University, Universitetskij pr. 13, Moscow, 19992, Russian Federation
Law D.R.:
Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD 21218, United States
Stassun K.G.:
Vanderbilt University Physics and Astronomy Department, 6301 Stevenson Center Ln., Nashville, TN 37235, United States
Drory N.:
McDonald Observatory, The University of Texas at Austin, 1 University Station, Austin, TX 78712, United States
Merrifield M.:
School of Physics and Astronomy, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom
Beers T.C.:
Department of Physics and Jina, Center for the Evolution of the Elements, University of Notre Dame, Notre Dame, IN 46556, United States
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