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The age of the main population of the Sagittarius dwarf spheroidal galaxy. Solving the "M giant conundrum"
M. Bellazzini, M. Correnti, F. R. Ferraro +2
We present a statistically decontaminated Color Magnitude Diagram of a 1 deg X 1 deg field in the core of the Sagittarius dSph galaxy. Coupling this CMD with the most recent metall…
The pure non-collisional Blue Straggler population in the giant stellar system omega Centauri
F. R. Ferraro, A. Sollima, R. T. Rood +3
We have used high spatial resolution data from the Hubble Space Telescope and wide-field ground-based observations to search for blue straggler stars (BSS) over the entire radial e…
Metallicities, relative ages and kinematics of stellar populations in omega Centauri
A. Sollima, E. Pancino, F. R. Ferraro +3
We present results of an extensive spectroscopic survey of Subgiant stars in the stellar system omega Centauri. Using infrared CaII triplet lines, we derived metallicities and radi…
Near-Infrared photometry and spectroscopy of NGC 6539 and UKS 1: two intermediate metallicity Bulge Globular Clusters
L. Origlia, E. Valenti, R. M. Rich +1
Using the SofI imager at ESO/NTT and NIRSPEC spectrograph at KeckII, we have obtained J,K images and echelle spectra covering the range 1.5 - 1.8 micron for the intermediate metall…
The Ital-FLAMES survey of the Sagittarius dwarf Spheroidal galaxy. I. Chemical abundances of bright RGB stars
L. Monaco, M. Bellazzini, P. Bonifacio +5
We present iron and element (Mg, Ca, Ti) abundances for a sample of 15 Red Giant Branch stars belonging to the main body of the Sagittarius dwarf Spheroidal galaxy. Abundances…
The Red Giant Branch Tip and Bump of the Leo II dwarf spheroidal galaxy
M. Bellazzini, N. Gennari, F. R. Ferraro
We present V and I photometry of a 9.4' X 9.4' field centered on the dwarf spheroidal galaxy Leo II. The Tip of the Red Giant Branch is identified at I^{TRGB}=17.83 +/- 0.03 and ad…
Discovery of a stellar system in the background of 47 Tucanae
M. Bellazzini, E. Pancino, F. R. Ferraro
We report on the discovery of a stellar system in the background of the Galactic globular cluster 47 Tucanae (NGC 104), located 14.8' North-West of the cluster center. The object,…