On the He burning phases of the Carina dSph
astro-ph.SR
/ Authors
M. Fabrizio, A. Pietrinferni, G. Bono, P. B. Stetson, A. R. Walker, R. Buonanno, S. Cassisi, I. Ferraro, G. Iannicola, M. Monelli
and 3 more authors
/ Abstract
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 α-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.