The BOCCE project is aimed at obtaining in the most homogeneous way the properties (age, distance, reddening, metallicity and detailed elemental abundances) of a sample of (mostly old) Galactic Open Clusters. A detailed description of our program and the results of the first part of the photometric survey can be found in Bragaglia & Tosi (2006).
The clusters observations can be divided in three parts:
(1) PHOTOMETRY : multiband optical CCD photometry (usually BVI)
(2) LOW-RED SPECTROSCOPY: multi object spectra to derive radial velocity and membership
(3) HIGH-RES SPECTROSCOPY: to measure metallicity and detailed chemical composition
distance, reddening and a first indication of metallicity are obtained
using the synthetic colour-magnitude diagram technique (as developed in
Tosi et al. 1991).
Results of the first 20 OCs can be found in Table 1
The CMDs for the first 20 OCs can be seen here
High-res spectra (FEROS@1.5m ESO, UVES@VLT, SARG@TNG, with R=30000-48000) have been obtained for 3-6 red clump stars per cluster. [Fe/H] and detailed metallcities for several clusters have been determined. See Table 2 for a list of the clusters already analyzed.
MOS with LRS@TNG has been used to derve RVs of stars in key evolutionary phases (Be 29, Be 32, Be 17 done up to now)A more complete list of the OCs in our sample can be found in Table 3