TNG Near-IR Photometry of five Galactic Globular Clusters

Abstract

We present near--infrared J and K observations of giant stars in five metal-poor Galactic Globular Clusters (namely M3, M5, M10, M13 and M92) obtained at the Telescopio Nazionale Galileo (TNG). This database has been used to determine the main photometric properties of the red giant branch (RGB) from the (K,J-K) and, once combined with the optical data, in the (K,V-K) Color Magnitude Diagrams. A set of photometric indices (the RGB colors at fixed magnitudes) and the major RGB evolutionary features (slope, bump, tip) have been measured. The results have been compared with the relations obtained by Ferraro et al. 2000 and with the theoretical expectations, showing a very good agreement.

arXiv comment10 pages, 12 figures, accepted by Astronomy and Astrophysics

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• The calibration of the RGB Tip as a Standard Candle: Extension to Near Infrared colors and higher metallicity
• Uncloaking globular clusters in the inner Galaxy
• The gas-to-extinction ratio and the gas distribution in the Galaxy
• The RR Lyrae Period - K Luminosity relation for Globular Clusters: an observational approach
• Near Infrared properties of 12 Globular Clusters toward the inner Bulge of the Galaxy
• The Red Giant Branch in Near-Infrared Colour-Magnitude Diagrams. II: The luminosity of the Bump and the Tip
• MIKiS: the Multi-Instrument Kinematic Survey of Galactic Globular Clusters. I. Velocity dispersion profiles and rotation signals of 11 globular clusters
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• The distance to the Leo I dwarf spheroidal galaxy from the Red Giant Branch Tip
• The RGB tip of galactic globular clusters and the revision of the bound of the axion-electron coupling
• Infrared Photometry of NGC 6791
• The Kinematic Properties of BHB and RR Lyrae stars towards the Anticentre and the North Galactic Pole: The Transition between the Inner and the Outer Halo
• Kinematic Structure in the Galactic Halo at the North Galactic Pole: RR Lyrae and BHB Stars show different kinematics
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• Near-Infrared photometry of four metal-rich Bulge globular clusters: NGC6304, NGC6569, NGC6637, NGC6638
• Near-Infrared Observations of RR Lyrae variables in Galactic Globular Clusters: I. The case of M92
• FSR1735 -- A new globular cluster candidate in the inner Galaxy
• An empirical tool to derive metallicity, reddening and distance for old stellar populations from near IR Color Magnitude Diagrams
• Near-Infrared Properties of Metal-poor Globular Clusters in the Galactic Bulge Direction
• UKIRT follow-up observations of the old open cluster FSR0358 (Kirkpatrick1)