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An aluminium tool for multiple stellar generations in the globular clusters 47 Tuc and M 4
Eugenio Carretta, Raffaele Gratton, Angela Bragaglia +2
We present aluminium abundances for a sample of about 100 red giant stars in each of the Galactic globular clusters 47 Tuc (NGC 104) and M 4 (NGC 6121). We have derived homogeneous…
The Na-O anticorrelation in horizontal branch stars. III. 47 Tuc and M 5
R. G. Gratton, S. Lucatello, A. Sollima +7
To check the impact of the multiple population scenario for globular clusters on their HB, we present an analysis of the composition of 110 red HB (RHB) stars in 47 Tucanae and of…
Chemical tagging of three distinct populations of red giants in the globular cluster NGC 6752
Eugenio Carretta, Angela Bragaglia, Raffaele Gratton +2
We present aluminium, magnesium, and silicon abundances in the metal-poor globular cluster NGC 6752 for a sample of more than 130 red giants with homogeneous oxygen and sodium abun…