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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        <foaf:name>Duque-Arribas, Christian</foaf:name>
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        <foaf:name>Montes, David</foaf:name>
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        <foaf:name>Caballero, Jose Antonio</foaf:name>
        <foaf:givenName>Jose Antonio</foaf:givenName>
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            <foaf:name>Centro de Astrobiología (CSIC-INTA), ESAC campus, Camino Bajo del Castillo s/n, 28691 Villanueva de la Cañada, Madrid, Spain</foaf:name>
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    <dct:title>The metallicity of M dwarfs: photometric calibrations with Markov Chain Monte Carlo and Bayesian inference</dct:title>
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    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#gYear">2021</dct:issued>
    <dcat:keyword>Cool Stars on the main sequence</dcat:keyword>
    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2021-02-25</dct:issued>
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    <dct:description>&lt;p&gt;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 &amp;le; [Fe/H] &amp;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.&lt;/p&gt;</dct:description>
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