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Double Blue Straggler sequences in GCs: the case of NGC 362
E. Dalessandro, F. R. Ferraro, D. Massari +8
We used high-quality images acquired with the WFC3 on board the HST to probe the blue straggler star (BSS) population of the Galactic globular cluster NGC 362. We have found two di…
Multi-wavelength Hubble Space Telescope photometry of stellar populations in NGC288
G. Piotto, A. P. Milone, A. F. Marino +5
We present new UV observations for NGC288, taken with the WFC3 detector on board the Hubble Space Telescope, and combine them with existing optical data from the archive to explore…
A Double White-Dwarf Cooling Sequence in ω Centauri
A. Bellini, J. Anderson, M. Salaris +4
We have applied our empirical-PSF-based photometric techniques on a large number of calibration-related WFC3/UVIS UV-B exposures of the core of ω Cen, and found a well-defined spli…
A WFC3/HST view of the three stellar populations in the Globular Cluster NGC6752
A. P. Milone, A. F. Marino, G. Piotto +9
Multi-band Hubble Space Telescope photometry reveals that the main sequence, sub-giant, and the red giant branch of the globular cluster NGC6752 splits into three main components i…