509 citations · 10.5k across the 231 of their papers we have counts for
12 papers · 1 filter
Near-IR properties of 24 Globular Clusters in the Galactic Bulge
E. Valenti, F. R. Ferraro, L. Origlia
We present near-IR Color-Magnitude Diagrams and physical parameters for a sample of 24 Galactic Globular Clusters toward the Bulge direction. In this paper we discuss the propertie…
High-resolution spectroscopy of RGB stars in the Sagittarius Streams. I. Radial velocities and chemical abundances
L. Monaco, M. Bellazzini, P. Bonifacio +5
Context. The Sagittarius (Sgr) dwarf spheroidal galaxy is currently being disrupted under the strain of the Milky Way. A reliable reconstruction of Sgr star formation history can o…
The radial distribution of blue straggler stars and the nature of their progenitors
M. Mapelli, S. Sigurdsson, F. R. Ferraro +3
The origin of blue straggler stars (BSS) in globular clusters (GCs) is still not fully understood: they can form from stellar collisions, or through mass transfer in isolated, prim…
A population of binaries in the Asymptotic Giant Branch of 47 Tucanae?
Giacomo Beccari, Francesco R. Ferraro, Barbara Lanzoni +1
We have used a set of archived Hubble Space Telescope/ACS images to probe the evolved populations of the globular cluster 47 Tucanae. We find an excess of Asymptotic Giant Branch (…
Deep FORS1 observations of the double Main Sequence of omega Centauri
A. Sollima, F. R. Ferraro, M. Bellazzini +3
We present the results of a deep photometric survey performed with FORS1@VLT aimed at investigating the complex Main Sequence structure of the stellar system omega Centauri. We con…
Detection of a population gradient in the Sagittarius Stream
M. Bellazzini, H. J. Newberg, M. Correnti +2
We present a quantitative comparison between the Horizontal Branch morphology in the core of the Sagittarius dwarf spheroidal galaxy (Sgr) and in a wide field sampling a portion of…
An empirical tool to derive metallicity, reddening and distance for old stellar populations from near IR Color Magnitude Diagrams
F. R. Ferraro, E. Valenti, L. Origlia
We present an empirical method to derive photometric metallicity, reddening and distance to old stellar populations by using a few major features of the Red Giant Branch (RGB) in n…
Red Giant stars in the Large Magellanic Cloud clusters
A. Mucciarelli, L. Origlia, F. R. Ferraro +2
We present deep J,H,Ks photometry and accurate Color Magnitude Diagrams down to K ~18.5, for a sample of 13 globular clusters in the Large Magellanic Cloud. This data set combined…
High resolution infrared spectroscopy of the old open cluster NGC6791
L. Origlia, E. Valenti, R. M. Rich +1
We report abundance analysis for 6 M giant members of the old open cluster NGC6791, based on infrared spectroscopy (1.5-1.8 micron) at R=25,000, using the NIRSPEC spectrograph at t…
The puzzling properties of the Helium White Dwarf orbiting the millisecond pulsar PSR J1911-5958A in NGC 6752
G. Cocozza, F. R. Ferraro, A. Possenti +1
We have used phase-resolved high-resolution images and low resolution spectra taken at the ESO Very Large Telescope, to study the properties of the low-mass Helium White Dwarf comp…
An empirical calibration of the mixing-length parameter alpha
F. R. Ferraro, E. Valenti, O. Straniero +1
We present an empirical calibration of the Mixing-Length free parameter based on a homogeneous Infrared database of 28 Galactic globular clusters spanning a wide metallicity ra…
The dynamical state and blue straggler population of the globular cluster NGC 6266 (M62)
G. Beccari, F. R. Ferraro, A. Possenti +3
We have used a proper combination of multiband high-resolution {\it HST-WFPC2} and wide-field ground based observations to image the galactic globular cluster NGC 6266 (M62). The e…