Deep near-IR photometry of eight metal-poor globular clusters in the Galactic bulge and halo

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作者：
Kim, J.-W. [1 ,2 ]
Kang, A. [1 ,2 ]
Rhee, J. [1 ,2 ]
Kim, H.-I. [3 ]
Kim, Y.-C. [1 ]
Kim, D.-G. [1 ,2 ]
Chung, C. [1 ,2 ]
Han, S.-I. [1 ,2 ]
Chun, M.-S. [1 ]
Sohn, Y.-J. [1 ,2 ]
机构：
[1] Department of Astronomy, Institute of Earth Atmosphere Astronomy, Yonsei University, Seoul 120-749, Korea, Republic of
[2] Center for Space Astrophysics, Yonsei University, Seoul 120-749, Korea, Republic of
[3] Korea Astronomy and Space Science Institute, Daejeon 305-348, Korea, Republic of
来源：
Astronomy and Astrophysics | 1600年 / 459卷 / 02期
关键词：
High quality J; H and K′ images are used to investigate the morphological properties of the near-infrared color-magnitude diagrams for five metal-poor bulge globular clusters and three halo clusters. Photometric parameters to describe the RGB shape; i.e; the colors at fixed magnitudes of MK = MH = (-5.5; -5; -4; and; -3); the magnitudes at fixed colors of (J - K)o = (J - H)o = 0.70; and the RGB slope; have been measured from the fiducial normal points of the CMDs. We also measured the near-infrared magnitudes of the RGB bump and tip on the luminosity function of the RGB stars for each cluster. The RGB parameters of the observed metal-poor bulge and halo clusters are consistent with the previous empirical relationships between the RGB parameters and the cluster metallicity for metal-rich bulge clusters and halo clusters. The near-infrared magnitudes of the RGB bump and tip are in good agreement with the theoretical prediction of the Yonsei-Yale isochrone. © ESO 2006;
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页码：499 / 509
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