Stellar Characterization of M Dwarfs from the APOGEE Survey: A Calibrator Sample for M-dwarf Metallicities

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Stellar Characterization of M Dwarfs from the APOGEE Survey : A Calibrator Sample for M-dwarf Metallicities

Souto, Diogo (författare): Univ Fed Sergipe, Dept Fis, Av Marechal Rondon S-N, BR-49000000 Sao Cristovao, SE, Brazil.;Observ Nacl MCTIC, R Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, Brazil.,National Observatory Brazil,Federal University of Sergipe

Cunha, Katia (författare): Observ Nacl MCTIC, R Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, Brazil.;Univ Arizona, Steward Observ, 933 North Cherry Ave, Tucson, AZ 85721 USA.,University of Arizona,National Observatory Brazil

Smith, Verne V. (författare): Natl Opt Astron Observ, 950 North Cherry Ave, Tucson, AZ 85719 USA.,National Optical Astronomy Observatory

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Allende Prieto, C. (författare): Inst Astrofis Canarias, E-38205 Tenerife, Spain.;Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain.,University of La Laguna (ULL),Instituto de Astrofísica de Canarias

Burgasser, Adam (författare): Univ Calif San Diego, Ctr Astrophys & Space Sci, La Jolla, CA 92093 USA.,University of California, San Diego

Covey, Kevin (författare): Western Washington Univ, Dept Phys & Astron, Bellingham, WA 98225 USA.,Western Washington University

Garcia-Hernandez, D. A. (författare): Inst Astrofis Canarias, E-38205 Tenerife, Spain.;Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain.,University of La Laguna (ULL),Instituto de Astrofísica de Canarias

Holtzman, Jon A. (författare): New Mexico State Univ, Las Cruces, NM 88003 USA.,New Mexico State University

Johnson, Jennifer A. (författare): Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.,Ohio State University

Jönsson, Henrik (författare): Malmö University,Lund University,Lunds universitet,Malmö universitet,Institutionen för materialvetenskap och tillämpad matematik (MTM),Lund Observatory, Department of Astronomy and Theoretical Physics, Lund University, Box 43, Lund, SE-22100, Sweden,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science

Mahadevan, Suvrath (författare): Penn State, Dept Astron & Astrophys, 525 Davey Lab, University Pk, PA 16802 USA.,Pennsylvania State University

Majewski, Steven R. (författare): Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA.,University of Virginia

Masseron, Thomas (författare): Inst Astrofis Canarias, E-38205 Tenerife, Spain.;Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain.,University of La Laguna (ULL),Instituto de Astrofísica de Canarias

Shetrone, Matthew (författare): Univ Texas Austin, McDonald Observ, Ft Davis, TX 79734 USA.,University of Texas at Austin

Rojas-Ayala, Barbara (författare): Univ Tarapaca, Inst Alta Invest, Casilla 7D, Arica, Chile.,University of Tarapacá

Sobeck, Jennifer (författare): Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA.,University of Virginia

Stassun, Keivan G. (författare): Vanderbilt Univ, Dept Phys & Astron, 6301 Stevenson Ctr Lane, Nashville, TN 37235 USA.,Vanderbilt University

Terrien, Ryan (författare): Carleton Coll, Dept Phys & Astron, Northfield, MN 55057 USA.,Carleton College

Teske, Johanna (författare): Observ Carnegie Inst Sci, 813 Santa Barbara St, Pasadena, CA 91101 USA.,Carnegie Observatories

Wanderley, Fabio (författare): Observ Nacl MCTIC, R Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, Brazil.,National Observatory Brazil

Zamora, Olga (författare): Inst Astrofis Canarias, E-38205 Tenerife, Spain.;Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain.,University of La Laguna (ULL),Instituto de Astrofísica de Canarias

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Univ Fed Sergipe, Dept Fis, Av Marechal Rondon S-N, BR-49000000 Sao Cristovao, SE, Brazil;Observ Nacl MCTIC, R Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, Brazil. National Observatory Brazil (creator_code:org_t)

2020-02-20
2020
Engelska.
Ingår i: Astrophysical Journal. - : Institute of Physics (IOP). - 0004-637X .- 1538-4357. ; 890:2

Relaterad länk:: https://doi.org/10.3...; visa fler...; https://iopscience.i...; http://dx.doi.org/10...; https://urn.kb.se/re...; https://doi.org/10.3...; https://lup.lub.lu.s...; visa färre...

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We present spectroscopic determinations of the effective temperatures, surface gravities, and metallicities for 21 M dwarfs observed at high resolution (R similar to 22,500) in the H band as part of the Sloan Digital Sky Survey (SDSS)-IV Apache Point Observatory Galactic Evolution Experiment (APOGEE) survey. The atmospheric parameters and metallicities are derived from spectral syntheses with 1D LTE plane-parallel MARCS models and the APOGEE atomic/molecular line list, together with up-to-date H2O and FeH molecular line lists. Our sample range in T-eff from similar to 3200 to 3800 K, where 11 stars are in binary systems with a warmer (FGK) primary, while the other 10 M dwarfs have interferometric radii in the literature. We define an M-KS-radius calibration based on our M-dwarf radii derived from the detailed analysis of APOGEE spectra and Gaia DR2 distances, as well as a mass-radius relation using the spectroscopically derived surface gravities. A comparison of the derived radii with interferometric values from the literature finds that the spectroscopic radii are slightly offset toward smaller values, with Delta= -0.01 +/- 0.02 R star/R-circle dot. In addition, the derived M-dwarf masses based upon the radii and surface gravities tend to be slightly smaller (by similar to 5%-10%) than masses derived for M-dwarf members of eclipsing binary systems for a given stellar radius. The metallicities derived for the 11 M dwarfs in binary systems, compared to metallicities obtained for their hotter FGK main-sequence primary stars from the literature, show excellent agreement, with a mean difference of [Fe/H](M dwarf - FGK primary) = +0.04 +/- 0.18 dex, confirming the APOGEE metallicity scale derived here for M dwarfs.

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Stellar Characterization of M Dwarfs from the APOGEE Survey : A Calibrator Sample for M-dwarf Metallicities

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