Poster Title: Proton capture elements in NGC 2808: probing a second generation of stars in globular clusters?
Abstract: I will present results of the abundance analysis on about 80 stars along the Red Giant Branch of the galactic globular cluster NGC 2808, using spectra acquired during the Science Verification program of FLAMES at VLT. Sodium abundances are derived for stars spanning a range of about 2 mag from the RGB tip. The resulting distribution is exploited to probe if a second generation of stars born from the ejecta of intermediate mass stars does exist in globular clusters. The case of NGC 2808 is also used as a pilot to present an ongoing program with FLAMES at VLT aimed to analyze several clusters to determine if any correlation exists between the cluster properties (in particular the extension of the HB) and the distribution of stars along the Na-O anticorrelation.
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