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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{
  "publisher": "Zenodo", 
  "DOI": "10.5281/zenodo.4562444", 
  "title": "The metallicity of M dwarfs: photometric calibrations with Markov Chain Monte Carlo and Bayesian inference", 
  "issued": {
    "date-parts": [
      [
        2021, 
        2, 
        25
      ]
    ]
  }, 
  "abstract": "<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>", 
  "author": [
    {
      "family": "Duque-Arribas, Christian"
    }, 
    {
      "family": "Montes, David"
    }, 
    {
      "family": "Tabernero, Hugo M."
    }, 
    {
      "family": "Marfil, Emilio"
    }, 
    {
      "family": "Caballero, Jose Antonio"
    }
  ], 
  "id": "4562444", 
  "event-place": "virtually anywhere", 
  "type": "graphic", 
  "event": "The 20.5th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (CS20.5)"
}
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