2013MNRAS.430.2358P

Query : 2013MNRAS.430.2358P

2013MNRAS.430.2358P - Mon. Not. R. Astron. Soc., 430, 2358-2362 (2013/April-2)

A new extended main-sequence turnoff star cluster in the Large Magellanic Cloud.

PIATTI A.E.

Abstract (from CDS):

We present results on the age and metallicity estimates of the poorly studied Large Magellanic Cloud (LMC) cluster SL 529, from CCD SDSS gr photometry obtained at the Gemini South telescope with the GMOS attached. The cluster main-sequence turnoffs (MSTO) region possesses an extended structure, with an age spread ( ∼ 0.5 Gyr) bigger than the mean age width of known extended MSTO (EMSTO) LMC clusters. We report for the first time a mean cluster age of 2.25 Gyr and a mean cluster metallicity of Z = 0.004, which place it as the most metal-poor and oldest cluster in the EMSTO LMC cluster group. In addition, the cluster red clump appears to be formed by two concentrations of stars - although it is not clear whether this feature can be caused, in part, by binary interactions and mergers - whereas the cluster core radius of 4.2 pc is in excellent agreement with those determined for the previously 12 known EMSTO LMC clusters.

Abstract Copyright: © 2013 The Author Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): techniques: photometric - galaxies: individual: LMC - Magellanic Clouds - galaxies: star clusters: general

VizieR on-line data: <Available at CDS (J/MNRAS/430/2358): table1.dat>

Simbad objects: 15

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Number of rows : 15
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 H88 7 Cl* 04 52 12 -69 00.4           ~ 8 0
3 NGC 1751 Cl* 04 54 12.91 -69 48 26.8   15.06 11.73     ~ 91 0
4 NGC 1783 GlC 04 59 08.590 -65 59 15.84   10.9 10.93     ~ 273 0
5 NGC 1806 GlC 05 02 11.180 -67 59 05.89   11.1       ~ 165 0
6 NGC 1846 Cl* 05 07 34.900 -67 27 32.45   12.08 11.31     ~ 231 0
7 NGC 1852 Cl* 05 09 23.760 -67 46 38.00   12.74 12.01     ~ 51 0
8 NGC 1917 Cl* 05 19 03.370 -69 00 06.34   12.90 12.33     ~ 46 0
9 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
10 NGC 1987 GlC 05 27 16.940 -70 44 14.16   12.1       ~ 92 0
11 ESO 86-5 Cl* 05 31 07.34 -63 32 25.8   14.39 13.66     ~ 15 0
12 NGC 2108 GlC 05 43 56.270 -69 10 54.37   12.90 12.32     ~ 69 0
13 NGC 2154 Cl* 05 57 38 -67 15.7   12.47 11.79     ~ 60 0
14 NGC 2173 GlC 05 57 58 -72 58.7   12.74 11.88     ~ 148 0
15 ESO 57-75 Cl* 06 13 27.3 -70 41 42   14.41 13.67     ~ 42 0

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