Chemical Evolution in the Carina Dwarf Spheroidal

Details Chemical Evolution in the Carina Dwarf Spheroidal Chemical Evolution in the Carina Dwarf Spheroidal

2004-10-19

arxiv.org/abs/astro-ph/0410435v1

Astronomy and Astrophysics

Astrophysics

3 pages, 2 figures, to be published in the proceedings of the ESO/Arcetri-workshop on "Chemical Abundances and Mixing in Stars

Scientific paper

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.

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