691 citations · 14.9k across the 240 of their papers we have counts for
4 papers · 1 filter
Blue Straggler Stars in the Unusual Globular Cluster NGC 6388
E. Dalessandro, B. Lanzoni, F. R. Ferraro +4
We have used multi-band high resolution HST WFPC2 and ACS observations combined with wide field ground-based observations to study the blue straggler star (BSS) population in the g…
The double Subgiant Branch of NGC 1851: the role of the CNO abundance
S. Cassisi, M. Salaris, A. Pietrinferni +4
We explore the possibility that the anomalous split in the Subgiant branch of the galactic globular cluster NGC 1851 is due to the presence of two distinct stellar populations with…
The ACS Survey of Galactic Globular Clusters. III. The Double Subgiant Branch of NGC 1851
A. P. Milone, L. R. Bedin, G. Piotto +13
Photometry with HST's ACS reveals that the subgiant branch (SGB) of the globular cluster NGC 1851 splits into two well-defined branches. If the split is due only to an age effect,…
A Triple Main Sequence in the Globular Cluster NGC 2808
G. Piotto, L. R. Bedin, J. Anderson +6
Accurate photometry with HST/ACS shows that the main sequence of the globular cluster NGC 2808 splits into three separate branches. The three MS branches may be associated with com…