Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-05-05
Mon.Not.Roy.Astron.Soc. 361 (2005) 272-282
Astronomy and Astrophysics
Astrophysics
12 pages, 15 figures, accepted for publication in MNRAS
Scientific paper
10.1111/j.1365-2966.2005.09173.x
We present high-quality near-Infrared photometry of four Bulge metal-rich globular clusters, namely: NGC 6304, NGC 6569, NGC 6637 and NGC 6638. By using the observed Colour-Magnitude Diagrams we derived a photometric estimates of the cluster reddening and distance. We performed a detailed analysis of the Red Giant Branch, presenting a complete description of morphologic parameters and evolutionary features (Bump and Tip). Photometric estimates of the cluster metallicity have been obtained by using the updated set of relations (published by our group) linking the metal abundance to a variety of near-Infrared indices measured along the Red Giant Branch. The detection of the Red Giant Branch Bump and the Tip is also presented and briefly discussed.
Ferraro Francesco R.
Origlia Livia
Valenti Elena
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