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Photometric properties of Stellar Populations in GGCs: a multi-wavelength approach
Francesco R. Ferraro
Globular star clusters are extremely important astrophysical objects since (1) they are prime laboratories for testing stellar evolution; (2) they are ``fossils'' from the epoch of…
The bright optical companion to the eclipsing millisecond pulsar in NGC 6397
Francesco R. Ferraro, Andrea Possenti, Nichi D'Amico +1
We report the possible optical identification of the companion to the eclipsing millisecond pulsar PSR J1740-5340 in the globular cluster NGC 6397. A bright variable star with an a…
Blue Stragglers, Young White Dwarfs and UV-excess stars in the core of 47 Tuc
Francesco R. Ferraro, Nichi D'Amico, Andrea Possenti +2
We used a set of archived HST/WFPC2 images to probe the stellar population in the core of the nearby Galactic Globular Cluster (GGC) 47 Tuc. From the ultraviolet (UV) Color Magnitu…
VLT observations of the peculiar globular cluster NGC 6712, II: luminosity and mass functions
G. Andreuzzi, G. De Marchi, F. Ferraro +3
We have carried out extensive VLT-FORS1 observations covering a fair fraction of the intermediate metallicity globular cluster NGC 6712 in the V and R bands. We derive accurate col…
VLT Observations of the Peculiar Globular Cluster NGC6712, III: The Evolved Stellar Population
Barbara Paltrinieri, Francesco R. Ferraro, Francesco Paresce +1
We present extensive UBVR photometry of the Galactic globular cluster (GGC) NGC6712 obtained with the ESO Very Large Telescope (VLT) which reach down to two magnitudes below the ma…
The White Dwarf Distance to the Globular Cluster 47 Tucanae and its Age
M. Zoccali, A. Renzini, S. Ortolani +9
We present a new determination of the distance (and age) of the Galactic globular cluster 47 Tucanae (NGC 104) based on the fit of its white dwarf (WD) cooling sequence with the em…