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On the He burning phases of the Carina dSph

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arxiv 1307.4324 v1 pith:FK4XXOMP submitted 2013-07-16 astro-ph.SR

M. Fabrizio , A. Pietrinferni , G. Bono , P.B. Stetson , A.R. Walker , R. Buonanno , S. Cassisi , I. Ferraro
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G. Iannicola M. Monelli M. Nonino L. Pulone F. Thevénin
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keywords burningcarinaphasesabundanceagreementalphaassumingchemical
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We performed a detailed comparison between predicted He burning phases and multiband photometry of the Carina dwarf spheroidal galaxy. We found a good agreement with the predictions computed assuming an {\alpha}-enhanced chemical mixture, indicating a mean metallicity [Fe/H] ~ -1.8 with a raw observed peak-to-peak spread in iron abundance of 0.4\pm0.2 dex.

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