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Discovery of Carbon/Oxygen depleted Blue Straggler Stars in 47 Tucanae: the chemical signature of a mass-transfer formation process
F. R. Ferraro, E. Sabbi, R. Gratton +10
We use high-resolution spectra obtained with the ESO Very Large Telescope to measure surface abundance patterns of 43 Blue Stragglers stars (BSS) in 47 Tuc. We discovered that a su…
The Integral Field Spectrograph of SPHERE: the Planet Finder for VLT
R. U. Claudi, M. Turatto, J. Antichi +14
SPHERE is an instrument designed and built by a consortium of French, German, Italian, Swiss and Dutch institutes in collaboration with ESO. The project is currently in its Phase B…
Detecting Extrasolar Planets with Integral Field Spectroscopy
A. Berton, R. G. Gratton, M. Feldt +5
Observations of extrasolar planets using Integral Field Spectroscopy (IFS), if coupled with an extreme Adaptive Optics system and analyzed with a Simultaneous Differential Imaging…
The metallicity of the old open cluster NGC 6791
Raffaele Gratton, Angela Bragaglia, Eugenio Carretta +1
We have observed four red clump stars in the very old and metal-rich open cluster NGC 6791 to derive its metallicity, using the high resolution spectrograph SARG mounted on the TNG…