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Chemical Abundances of Metal-poor stars in Dwarf Galaxies

  • Kim A. Venn (a1), Pascale Jablonka (a2), Vanessa Hill (a3), Else Starkenburg (a4), Bertrand Lemasle (a5), Matthew Shetrone (a6), Mike Irwin (a7), John Norris (a8), David Yong (a8), Gerry Gilmore (a7), Stephania Salvadori (a9), Asa Skuladottir (a9) and Eline Tolstoy (a9)...

Abstract

Stars in low-mass dwarf galaxies show a larger range in their chemical properties than those in the Milky Way halo. The slower star formation efficiency make dwarf galaxies ideal systems for testing nucleosynthetic yields. Not only are alpha-poor stars found at lower metallicities, and a higher fraction of carbon-enhanced stars, but we are also finding stars in dwarf galaxies that appear to be iron-rich. These are compared with yields from a variety of supernova predictions.

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