Metal abundances in extremely distant Galactic old open clusters. II. Berkeley 22 and Berkeley 66

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dc.creatorVillanova, Sandro
dc.creatorCarraro, Giovanni
dc.creatorBresolin, Fabio
dc.creatorPtat, Ferdinando
dc.date2005-04-13
dc.date.accessioned2026-07-07T11:29:41Z
dc.date.available2026-07-07T11:29:41Z
dc.descriptionWe report on high resolution spectroscopy of four giant stars in the Galactic old open clusters Berkeley~22 and Berkeley~66 obtained with HIRES at the Keck telescope. We find that $[Fe/H]=-0.32\pm0.19$ and $[Fe/H]=-0.48\pm0.24$ for Berkeley~22 and Berkeley~66, respectively. Based on these data, we first revise the fundamental parameters of the clusters, and then discuss them in the context of the Galactic disk radial abundance gradient. We found that both clusters nicely obey the most updated estimate of the slope of the gradient from \citet{fri02} and are genuine Galactic disk objects.
dc.description20 pages, 6 eps figures, accepted for publication in the Astronomical Journal
dc.identifierhttps://arxiv.org/abs/astro-ph/0504282
dc.identifierhttp://arxiv.org/abs/astro-ph/0504282
dc.identifierAstron.J.130:652-658,2005
dc.identifierdoi:10.1086/430958
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/196795
dc.subjectAstrophysics
dc.titleMetal abundances in extremely distant Galactic old open clusters. II. Berkeley 22 and Berkeley 66
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