156 citations · 298 across the 4 of their papers we have counts for
5 papers
The fraction of second generation stars in Globular Clusters from the analysis of the Horizontal Branch
F. D'Antona, V. Caloi
Most Globular Clusters (GC) show chemical inhomogeneities in the composition of their stars, apparently due to a second stellar generation (SG) in which the forming gas is enriched…
Multiple stellar populations in Globular Clusters: collection of information from the Horizontal Branch
F. D'Antona, V. Caloi
The majority of the inhomogeneities in the chemical composition of Globular Cluster (GC) stars appear due to primordial enrichment by hot-CNO cycled material processed in stars bel…
The first stages of the evolution of Globular Clusters
Francesca D'Antona, Paolo Ventura, Vittoria Caloi
The majority of the inhomogeneities in the chemical composition of Globular Cluster (GC) stars appear due to primordial enrichment. The most studied model today claims that the eje…
NGC 6441: another indication for a very high helium content in Globular Cluster stars
V. Caloi, F. D'Antona
The metal-rich bulge globular cluster NGC 6441 shows a well developed blue horizontal branch (Rich et al.), together with a strong slope upward from the red clump to the blue of th…
A helium spread among the main sequence stars in NGC 2808
F. D'Antona, M. Bellazzini, V. Caloi +3
We studied the color distribution of the main sequence of the Globular Cluster NGC 2808, based on new deep HST-WFPC2 photometry of a field in the uncrowded outskirts of the cluster…