Chemical abundances in the multiple sub-giant branch of 47 Tucanae: insights on its faint sub-giant branch component

A. F. Marino, A. P. Milone, L. Casagrande +8

The globular cluster 47 Tuc exhibits a complex sub-giant branch (SGB) with a faint-SGB comprising only about the 10% of the cluster mass and a bright-SGB hosting at least two disti…