Near-infrared photometry of four metal-rich bulge globular clusters: NGC 6304, 6569, 6637 and 6638★

2005/05/05 by E. Valenti, L. Origlia, F. R. Ferraro · 1 citation
Physics and Astronomy · #Astronomy #Astrophysics #Bulge #Galaxy #Globular cluster #Metallicity #Open cluster #Photometric system #Photometry (optics) #Physics #Red-giant branch #Star cluster #Stars #Stellar, planetary, and galactic studies #astro-ph

paper · pdf · doi:10.1111/j.1365-2966.2005.09173.x

published as Mon.Not.Roy.Astron.Soc. 361 (2005) 272-282 · 12 pages, 15 figures, accepted for publication in MNRAS

arxiv created 2005/05/05 · openalex publication_date 2005/07/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We present high-quality near-infrared (near-IR) photometry of four bulge metal-rich globular clusters, namely NGC 6304, 6569, 6637 and 6638. By using the observed colour—magnitude diagrams we derived photometric estimates of the cluster reddening and distance. We performed a detailed analysis of the red giant branch (RGB), presenting a complete description of its morphologic parameters and evolutionary features (bump and tip). Photometric estimates of the cluster metallicity were obtained using the updated data set (published by our group) linking metal abundance to a variety of near-IR indices measured along the RGB. The detection of the RGB bump and tip is also presented and briefly discussed.

Citations

• A Step toward the Calibration of the Red Giant Branch Tip as a Standard Candle
• Detailed chemical composition of the open cluster IC 4651: The iron peak, α elements, and Li
• Red giant branch in near-infrared colour-magnitude diagrams - I. Calibration of photometric indices
• High-resolution infrared spectra of NGC 6342 and 6528: two moderately reddened bulge globular clusters
• An Abundance Analysis for Four Red Horizontal-Branch Stars in the Extremely Metal-Rich Globular Cluster NGC 6528
• A Catalog of Parameters for Globular Clusters in the Milky Way
• The Puzzling Dynamical Status of the Core of the Globular Cluster NGC 6752
• High-Resolution Infrared Spectra of Bulge Globular Clusters: The Extreme Chemical Abundances of Terzan 4 and Terzan 5
• Variable Stars in Galactic Globular Clusters
• DAOPHOT - A computer program for crowded-field stellar photometry
• Comparison between Predicted and Empirical [FORMULA][F]ΔV[SUP][RM]bump[/RM][/SUP][INF][RM]HB[/RM][/INF][/F][/FORMULA] in Galactic Globular Clusters
• V, J, H and K imaging of the metal rich globular cluster NGC 6528

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• The MAVERIC Survey: Still No Evidence for Accreting Intermediate-mass Black Holes in Globular Clusters