Poster Open Access

The metallicity of M dwarfs: photometric calibrations with Markov Chain Monte Carlo and Bayesian inference

Duque-Arribas, Christian; Montes, David; Tabernero, Hugo M.; Marfil, Emilio; Caballero, Jose Antonio


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    "description": "<p>In our on-going effort to characterize M dwarfs, we have carried out multi-band photometry calibrations of metallicity for early and intermediate M dwarfs using Gaia EDR3, 2MASS and AllWISE. These catalogs, combined with a sample of 5435 M dwarfs with additional parameters determined by APOGEE high-resolution spectroscopy, allow us to study the effect of the chemical composition in color-color and color-magnitude diagrams. We train the calibrations using Bayesian statistics and Markov Chain Monte Carlo (MCMC) techniques and derive several photometric calibrations aplicable to M dwarfs with metallicities of -0.4 &le; [Fe/H] &le; +0.4, obtaining estimations reliable to 0.10 dex. Lastly, we compare our results with previous photometric studies of metallicity for an additional sample of FGK+M common-proper-motion systems, finding a great predictive performance.</p>", 
    "contributors": [
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    "title": "The metallicity of M dwarfs: photometric calibrations with Markov Chain Monte Carlo and Bayesian inference", 
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    "references": [
      "Birky, J. et al. 2020, ApJ, 892, 31", 
      "Bressan, A. et al. 2012, MNRAS, 427, 127", 
      "Davenport, J. R. A. & Dorn-Wallenstein, T. Z. 2019, RNAAS, 3, 54", 
      "Mann, A. et al. 2013, AJ, 145, 52", 
      "Montes, D. et al. 2018, MNRAS, 479, 1332"
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    "keywords": [
      "Cool Stars on the main sequence"
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    "publication_date": "2021-02-25", 
    "creators": [
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        "orcid": "0000-0002-1758-3973", 
        "affiliation": "Departamento de F\u00edsica de la Tierra y Astrof\u00edsica & IPARCOS-UCM (Instituto de F\u00edsica de Part\u00edculas y del Cosmos de la UCM), 0 Facultad de Ciencias F\u00edsicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain", 
        "name": "Duque-Arribas, Christian"
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        "affiliation": "Departamento de F\u00edsica de la Tierra y Astrof\u00edsica & IPARCOS-UCM (Instituto de F\u00edsica de Part\u00edculas y del Cosmos de la UCM), 0 Facultad de Ciencias F\u00edsicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain", 
        "name": "Montes, David"
      }, 
      {
        "affiliation": "Centro de Astrobiolog\u00eda (CSIC-INTA), Carretera de Ajalvir km 4, Torrej\u00f3n de Ardoz, 28850 Madrid, Spain", 
        "name": "Tabernero, Hugo M."
      }, 
      {
        "affiliation": "Departamento de F\u00edsica de la Tierra y Astrof\u00edsica & IPARCOS-UCM (Instituto de F\u00edsica de Part\u00edculas y del Cosmos de la UCM), 0 Facultad de Ciencias F\u00edsicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain", 
        "name": "Marfil, Emilio"
      }, 
      {
        "affiliation": "Centro de Astrobiolog\u00eda (CSIC-INTA), ESAC campus, Camino Bajo del Castillo s/n, 28691 Villanueva de la Ca\u00f1ada, Madrid, Spain", 
        "name": "Caballero, Jose Antonio"
      }
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