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APOGEE Chemical Abundances of the Large Magellanic Cloud

Abstract:

To date, the SDSS-IV APOGEE survey has obtained S/N> 70 spectra for over 2,500 red giant stars distributed across much of the Large Magellanic Cloud (LMC), allowing for the characterization of the detailed abundance patterns for 10+ chemical elements. In this project, we interpret the chemical abundance patterns of the LMC by comparing them to the chemical abundance patterns of the Sagittarius Dwarf Galaxy (Sgr) and the Milky Way (MW), as well as by invoking chemical evolution models (such as flexCE and chempy) that include the LMC's star formation history. Preliminary results show that the LMC shares [Ni/Fe] and [Al/Fe] deficiencies with Sgr, but exhibits alpha-element abundances ([O/Fe],[Mg/Fe], and [Si/Fe]) that are near-solar. There is also a correlation with [O/Fe] and [Mg/Fe] with [Fe/H] at [Fe/H]>-1.0. These results suggest that the LMC exhibited low star formation efficiency (as compared to Sgr and …

Año de publicación:

2019

Keywords:

    Fuente:

    googlegoogle

    Tipo de documento:

    Other

    Estado:

    Acceso abierto

    Áreas de conocimiento:

      Áreas temáticas:

      • Química inorgánica
      • Otras ramas de la ingeniería
      • Cuerpos y fenómenos celestes específicos

      Contribuidores:

      Samantha ArgudoSamantha Argudo