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Probing the Galactic Bulge with deep Adaptive Optics imaging: the age of NGC 6440
L. Origlia, S. Lena, E. Diolaiti +4
We present first results of a pilot project aimed at exploiting the potentiality of ground based adaptive optics imaging in the near infrared to determine the age of stellar cluste…
Near-Infrared Photometry of Four Stellar Clusters in the Small Magellanic Cloud
Alessio Mucciarelli, Livia Origlia, Claudia Maraston +1
We present high-quality J, H and K photometry of four Small Magellanic Cloud stellar clusters with intermediate ages in the 1-7 Gyr range (namely NGC 339, 361, 416 and 419) . We ob…
The chemical composition of red giant stars in four intermediate-age clusters of the Large Magellanic Cloud
A. Mucciarelli, E. Carretta, L. Origlia +1
This paper presents the chemical abundance analysis of a sample of 27 red giant stars located in 4 popolous intermediate-age globular clusters in the Large Magellanic Cloud, namely…
A puzzling millisecond pulsar companion in NGC 6266
G. Cocozza, F. R. Ferraro, A. Possenti +5
We report on the optical identification of the companion to the eclipsing millisecond pulsar PSR J17013006B in the globular cluster NGC 6266. A relatively bright star with an an…
Another Non-segregated Blue Straggler Population in a Globular Cluster: the Case of NGC 2419
E. Dalessandro, B. Lanzoni, F. R. Ferraro +4
We have used a combination of ACS-HST high-resolution and wide-field SUBARU data in order to study the Blue Straggler Star (BSS) population over the entire extension of the remote…
The Blue Straggler population in the globular cluster M53 (NGC5024): a combined HST, LBT, CFHT study
G. Beccari, B. Lanzoni, F. R. Ferraro +24
We used a proper combination of multiband high-resolution and wide field multi-wavelength observations collected at three different telescopes (HST, LBT and CFHT) to probe Blue Str…
A Correlation between Blue Straggler and Binary Fractions in the core of Galactic Globular Clusters
A. Sollima, B. Lanzoni, G. Beccari +2
Context. Blue Stragglers Stars (BSSs) are thought to form in globular clusters by two main formation channels: i) mergers induced by stellar collisions and ii) coalescence or mass-…