2024MNRAS.529.3998S

Query : 2024MNRAS.529.3998S

2024MNRAS.529.3998S - Mon. Not. R. Astron. Soc., 529, 3998-4014 (2024/April-3)

Homogeneous metallicities for 14 old LMC globular clusters based on their fundamental mode RR Lyrae stars.

SARAJEDINI A.

Abstract (from CDS):

We present the first internally consistent set of [Fe/H] values for 14 of the 15 old globular clusters in the Large Magellanic Cloud (LMC). We make use of periods and amplitudes of fundamental mode (ab-type) RR Lyrae stars in the vicinity of these LMC clusters, mostly taken from the Optical Gravitational Lensing Experiment (OGLE) data base, in order to calculate metallicities for the clusters. Our data set contains a total of 417 ab-type cluster RR Lyrae stars (289 from OGLE and the rest from the literature) and yields a set of homogeneous metallicities for 14 old LMC globular clusters all on the Zinn and West scale. No previously published work contains metallicities for as many of the old LMC globular clusters as presented herein. An analysis of a subset of our abundances compared with seven other metallicity studies in the peer-reviewed literature indicates very little overall agreement between these [Fe/H] values suggesting that significantly more effort needs to be devoted to measuring internally consistent [Fe/H]s for the old LMC globular clusters.

Abstract Copyright: © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): stars: horizontal branch - stars: variables: RR Lyrae

Simbad objects: 18

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Number of rows : 18
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 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
2 NGC 1466 GlC 03 44 32.71 -71 40 18.0   11.6 11.59     ~ 166 0
3 NAME Ret GlC 04 36 10.15 -58 51 34.8   14.00 14.25 13.50   ~ 177 1
4 NGC 1841 GlC 04 45 24.38 -83 59 53.3   12.23 11.43     ~ 190 0
5 NGC 1754 Cl* 04 54 18.080 -70 26 32.58   12.32 11.57     ~ 96 0
6 NGC 1786 Cl* 04 59 07.470 -67 44 45.44   10.1       ~ 152 0
7 NGC 1835 Cl* 05 05 09.210 -69 24 20.96   11.314 10.596     ~ 173 0
8 NGC 1898 As* 05 16 45.380 -69 39 16.76   12.62 11.86     ~ 104 0
9 NGC 1916 Cl* 05 18 37.87 -69 24 22.9   11.16 10.38     ~ 94 0
10 NGC 1928 Cl* 05 20 55.940 -69 28 34.96   13.34 12.47     ~ 68 0
11 NGC 1939 Cl* 05 21 26.82 -69 56 59.0   12.52 11.83     ~ 61 0
12 NAME LMC Bar PoG 05 22 08 -69 23.5           ~ 343 0
13 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
14 NGC 2005 Cl* 05 30 08.500 -69 45 14.42   12.30 11.57     ~ 103 0
15 NGC 2019 Cl* 05 31 56.48 -70 09 32.5   10.9 10.86     ~ 124 0
16 NGC 2210 GlC 06 11 31.296 -69 07 17.04   10.9 10.94     ~ 196 0
17 NAME Hodge 11 GlC 06 14 22.92 -69 50 54.9   12.57 11.93     ~ 117 0
18 NGC 2257 Cl* 06 30 12.62 -64 19 40.0   13.24 12.62     ~ 228 0

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