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NGC1866: New analysis from HST-WFPC2 observations of the inner regions
E. Di Carlo, G. Raimondo, E. Brocato +2
We report new results on the LMC globular cluster NGC 1866 obtained by analyzing F555W and F814W images from WFPC2@HST. On the basis of the CMD we derive information on the cluster…
Some clues on the tilt of the Horizontal Branches in metal-rich clusters
G. Raimondo, V. Castellani, S. Cassisi +2
We discuss some clues on the large tilt observed in the Horizontal Branch of the metal-rich galactic globular clusters NGC 6388 and NGC 6441. This not yet understood feature is inv…
Surface Brightness Fluctuations: a theoretical point of view
M. Cantiello, G. Raimondo, E. Brocato +1
We present new theoretical evaluations of optical and near-IR Surface Brightness Fluctuations (SBF) magnitudes for single-burst stellar populations in the age range t=5-15 Gyr and…
On the observational properties of He-burning stars: some clues on the tilt of the HB in metal rich clusters
G. Raimondo, V. Castellani, S. Cassisi +2
We investigate the predicted Color-Magnitude distribution of metal-rich Horizontal Branch (HB) stars, discussing selected theoretical models computed under various assumptions abou…