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Discovery of another peculiar radial distribution of Blue Stragglers in Globular Clusters: The case of 47 Tuc
Francesco R. Ferraro, Giacomo Beccari, Robert T. Rood +3
We have used high resolution WFPC2-HST and wide field ground-based observations to construct a catalog of blue straggler stars (BSS) in the globular cluster 47 Tuc spanning the ent…
Theoretical Examination of the Lithium Depletion Boundary
Christopher J. Burke, Marc H. Pinsonneault, Alison Sills
We explore the sensitivity in open cluster ages obtained by the lithium depletion boundary (LDB) technique to the stellar model input physics. The LDB age technique is limited to o…
Blue Straggler Stars: a direct comparison of Star counts and population ratios in six Galactic Globular Clusters
Francesco R. Ferraro, Alison Sills, Robert T. Rood +2
The central regions of six Galactic Globular Clusters (GGCs) (M3, M80, M10, M13, M92 and NGC 288) have been imaged using HST-WFPC2 and the ultraviolet (UV) filters (F255W, F336W).…