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Chemical evolution in the Carina dwarf spheroidal

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Published
  • Andreas Koch
  • E. K. Grebel
  • Daniel Harbeck
  • M. I. Wilkinson
  • Jan Kleyna
  • G. Gilmore
  • Rosemary F. G. Wyse
  • N. W. Evans
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Publication date2005
Host publicationChemical Abundances and Mixing in Stars in the Milky Way and its Satellites
EditorsSofia Randich, Luca Pasquini
PublisherSpringer
Pages249-251
Number of pages3
ISBN (electronic)9783540341369
ISBN (print)9783540341352
<mark>Original language</mark>English

Publication series

NameESO Astrophysics Symposia
PublisherSpringer
ISSN (Print)1431-2433

Abstract

We present metallicities for 487 red giants in the Carina dwarf spheroidal (dSph) galaxy that were obtained from FLAMES low-resolution Ca triplet (CaT) spectroscopy. We find a mean [Fe/H] of –1.91 dex with an intrinsic dispersion of 0.25 dex, whereas the full spread in metallicities is at least one dex. The analysis of the radial distribution of metallicities reveals that an excess of metal poor stars resides in a region of larger axis distances. These results can constrain evolutionary models and are discussed in the context of chemical evolution in the Carina dSph.