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Resolved photometry of Young Massive Clusters in the starburst galaxy NGC 4214
A. Sollima, M. Cignoni, R. G. Gratton +4
We present the results of deep high resolution imaging performed with ACS/HRC@HST in the most active region of the nearby starburst galaxy NGC 4214. We resolved the stellar populat…
Rubidium abundances in the globular clusters NGC 6752, NGC 1904 and NGC 104 (47 Tuc)
Valentina D'Orazi, Maria Lugaro, Simon W. Campbell +5
Large star-to-star variations of the abundances of proton-capture elements, such as Na and O, in globular clusters (GCs) are interpreted as the effect of internal pollution resulti…
Performances tests on the SPHERE-IFS
Dino Mesa, Raffaele Gratton, Riccardo U. Claudi +13
Until now, just a few extrasolar planets (~30 out of 860) have been found through the direct imaging method. This number should greatly improve when the next generation of High Con…
NGC 362: another globular cluster with a split red giant branch
E. Carretta, A. Bragaglia, R. G. Gratton +7
We obtained FLAMES GIRAFFE+UVES spectra for both first and second-generation red giant branch (RGB) stars in the globular cluster (GC) NGC 362 and used them to derive abundances of…
Infrared photometry of Young Massive Clusters in the starburst galaxy NGC 4214
A. Sollima, R. G. Gratton, E. Carretta +2
We present the results of an infrared photometric survey performed with NICS@TNG in the nearby starburst galaxy NGC 4214. We derived accurate integrated JK magnitudes of 10 young m…
Astrophysical false positives in direct imaging for exoplanets: a white dwarf close to a rejuvenated star
A. Zurlo, A. Vigan, J. Hagelberg +17
As is the case for all techniques involved in the research for exoplanets, direct imaging has to take into account the probability of so-called astrophysical false positives, which…