Poster Open Access

Mapping M Dwarf Metallicities

DiTomasso, Victoria; Schmidt, Sarah J.


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        <foaf:givenName>Victoria</foaf:givenName>
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        <foaf:name>Schmidt, Sarah J.</foaf:name>
        <foaf:givenName>Sarah J.</foaf:givenName>
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    <dct:title>Mapping M Dwarf Metallicities</dct:title>
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    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#gYear">2019</dct:issued>
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    <dct:description>&lt;p&gt;We use distances derived from Gaia parallaxes cross-matched with SDSS, WISE and 2MASS photometry to assemble a sample of approximately 2 million M dwarfs, defined as stars with SDSS colors redder than r-i = 0.3 and i-z = 0.2. Previous work has found relations between SDSS r-z and WISE W1-W2 colors and the effective temperature and metallicities of cool stars (3550-4200 K). Using our sample and these previously derived relationships, we measure these stars&amp;#39; metallicities and effective temperatures. We calculate the metallicity distribution gradient as a function of galactic height for M dwarfs within 1000 pc of the Sun, which ultimately lends insight to the kinematic and chemical evolution of the Galaxy.&lt;/p&gt;</dct:description>
    <dct:description xml:lang="">{"references": ["Cheng, J. Y., et al. Metallicity Gradients in the Milky Way Disk as Observed by the SEGUE Survey", "Davenport, J. R. A. &amp; Dorn-Wallenstein, T. Z., Photometric Metallicities for Low-mass Stars with Gaia and WISE", "Garcia Perez, A. E., et al. (2015) ASPCAP: The APOGEE Stellar Parameter and Chemical Abundances Pipeline", "Green, G. M., et al. (2018) Galactic reddening in 3D from stellar photometry - an improved map", "Hartkopf, W.I. &amp; Yoss, K.M. (1982) A Kinematic and Abundance Survey at the Galactic Poles", "Schlesinger, K.J., et al. (2014) The Vertical Metallicity Gradient of the Milky Way Disk: Transitions in [\u03b1/Fe] Populations", "Schmidt, S. J., et al. (2016) Examining the relationships between colour, Teff, and [M/H] for APOGEE K and M dwarfs", "Woolf, V. M. &amp; West, A. A. (2012) The M dwarf problem in the Galaxy"]}</dct:description>
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