An IRAC@Spitzer survey of GGCs.

A mid-IR deep survey of the central regions of 17 Galactic globular clusters (GGCs), spanning the entire range of metallicity between approximately a hundredth solar up to solar, has been made using the InfraRed Array Camera (IRAC) on board the Spitzer Space Telescope. IRAC is a four-channel camera that provides simultaneous 5.2’×5.2’ images at 3.6, 4.5, 5.8 and 8.0 microns. The main goal of our project is the detailed study of mass loss (ML) in first ascent Population II giants whit varying stellar parameters, metal content and Horizontal Branch (HB) morphology.