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Intrinsic iron spread and a new metallicity scale for Globular Clusters
Eugenio Carretta, Angela Bragaglia, Raffaele Gratton +2
We have collected spectra of about 2000 red giant branch (RGB) stars in 19 Galactic globular clusters (GC) using FLAMES@VLT (about 100 star with GIRAFFE and about 10 with UVES, res…
Na-O Anticorrelation and HB. VII. The chemical composition of first and second-generation stars in 15 globular clusters from GIRAFFE spectra
E. Carretta, A. Bragaglia, R. G. Gratton +12
We present abundances of Fe, Na, and O for 1409 red giant stars in 15 galactic globular clusters, derived from the homogeneous analysis of high resolution FLAMES/GIRAFFE spectra. C…
Metallicity of low-mass stars in Orion
V. D'Orazi, S. Randich, E. Flaccomio +3
Determining the metal content of low-mass members of young associations provides a tool that addresses different issues, such as triggered star formation or the link between the me…
Chemical composition of the young open clusters IC2602 and IC2391
Valentina D'Orazi, Sofia Randich
Galactic open clusters have been long recognized as one of the best tools to investigate the chemical content of Galactic disk and its time evolution. In the last decade, many effo…
Enhanced production of barium in low-mass stars: evidence from open clusters
Valentina D'Orazi, Laura Magrini, Sofia Randich +3
We report the discovery of a trend of increasing barium abundance with decreasing age for a large sample of Galactic open clusters. The observed pattern of [Ba/Fe] vs. age can be r…