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Near-Infrared Photometry of the Globular Cluster Palomar 6

Lee, Jae-Woo and Carney, Bruce W. (2002) Near-Infrared Photometry of the Globular Cluster Palomar 6. Astronomical Journal, 123 (6). pp. 3305-3317. ISSN 0004-6256. doi:10.1086/340464.

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We present JHK photometry of Palomar 6. Our photometric measurements range from the red giant branch (RGB) tip to ≈2 mag below the red horizontal branch (RHB), and our color-magnitude diagrams show that Palomar 6 appears to have a well-defined RHB population. The distance modulus and interstellar reddening of the cluster are estimated by comparing the magnitude and color of Palomar 6 RHB stars with those of 47 Tuc. We obtain (m - M)_0 = 14.28 mag and E(B-V) = 1.30 mag for the cluster, and our study suggests that Palomar 6 is clearly located in the Galaxy's central regions. We also discuss the metallicity of the cluster using the slope of the RGB. We obtain [Fe/H] ≈ -1.2 for Palomar 6 and our metallicity estimate is ≈0.5–1.0 dex lower than previous estimates by others.

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Additional Information:© 2002. The American Astronomical Society. Received 2001 September 19; accepted 2002 February 28. This is part of the Ph.D. thesis work of J.-W. Lee at the University of North Carolina at Chapel Hill. J.-W. Lee thanks Dante Minniti for providing his photometric table. We also thank an anonymous referee for useful comments and a careful review of the paper. This research was supported by the National Aeronautics and Space Administration grant number GO-07318.04-96A from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555 and National Science Foundation grants AST 96-19381 and AST 99-88156. Support for this work was also provided in part by the Creative Research Initiative Program of the Korean Ministry of Science and Technology.
Funding AgencyGrant Number
NASANAS 5-26555
NSFAST 96-19381
NSFAST 99-88156
Ministry of Science and Technology (Korea)UNSPECIFIED
Subject Keywords:color-magnitude diagrams ; globular clusters: individual (Palomar 6) ; stars: horizontal-branch; stars: Population II
Issue or Number:6
Record Number:CaltechAUTHORS:20170408-161833878
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Official Citation:Jae-Woo Lee and Bruce W. Carney 2002 AJ 123 3305
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:76167
Deposited By: 1Science Import
Deposited On:09 Aug 2017 21:02
Last Modified:15 Nov 2021 16:58

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