2002AJ....124.2625S


Query : 2002AJ....124.2625S

2002AJ....124.2625S - Astron. J., 124, 2625-2632 (2002/November-0)

K-band red clump distances to the Large Magellanic Cloud clusters Hodge 4 and NGC 1651.

SARAJEDINI A., GROCHOLSKI A.J., LEVINE J. and LADA E.

Abstract (from CDS):

We present near-infrared color-magnitude diagrams (CMDs) for the Large Magellanic Cloud (LMC) star clusters Hodge 4 and NGC 1651, revealing the helium-burning red clump (RC) stars for the first time in the JK passbands. From these diagrams, which extend to K∼19, and existing optical CMDs that reveal the clusters' main-sequence turnoffs, we determine the following cluster parameters. For Hodge 4, we estimate a metallicity of [Fe/H]=-0.17±0.04, an age of 1.7±0.3 Gyr, and a RC absolute magnitude of MK(RC)=-1.64±0.17. Along with an adopted reddening of E(J-K)=0.03±0.01 based on the Burstein & Heiles and Schlegel et al. reddening maps, we find a distance of (m-M)0=18.52±0.17 for Hodge 4. In the case of NGC 1651, we derive [Fe/H]=-0.07±0.10, an age of 1.8±0.3 Gyr, MK(RC)=-1.56±0.12, E(J-K)=0.06±0.01, and (m-M)0=18.55±0.12, all measured in the same manner as for Hodge 4. Based on these two clusters, we calculate a mean LMC distance of (m-M)0=18.54±0.10.

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Journal keyword(s): Stars: Color-Magnitude Diagrams - Galaxies: Dwarf - Galaxies: Irregular - Galaxies: Star Clusters - Galaxies: Local Group - Galaxies: Magellanic Clouds - Stars: Abundances - Stars: Distances - Stars: Horizontal-Branch

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026
#notes
1 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
2 NGC 1651 GlC 04 37 32.530 -70 35 08.71   12.99 12.28     ~ 125 0
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
4 NAME Local Group GrG ~ ~           ~ 9325 0

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