2017MNRAS.468.3150M

Query : 2017MNRAS.468.3150M

2017MNRAS.468.3150M - Mon. Not. R. Astron. Soc., 468, 3150-3158 (2017/July-1)

The search for multiple populations in Magellanic Cloud Clusters - III. No evidence for multiple populations in the SMC cluster NGC 419.

MARTOCCHIA S., BASTIAN N., USHER C., KOZHURINA-PLATAIS V., NIEDERHOFER F., CABRERA-ZIRI I., DALESSANDRO E., HOLLYHEAD K., KACHAROV N., LARDO C., LARSEN S., MUCCIARELLI A., PLATAIS I., SALARIS M., CORDERO M., GEISLER D., HILKER M., LI C. and MACKEY D.

Abstract (from CDS):

We present the third paper about our ongoing Hubble Space Telescope survey for the search for multiple stellar populations (MPs) within Magellanic Cloud clusters. We report here the analysis of NGC 419, an ∼1.5 Gyr old, massive (>=2 x 105 M☉) star cluster in the Small Magellanic Cloud (SMC). By comparing our photometric data with stellar isochrones, we set a limit on [N/Fe] enhancement of <=+0.5 dex and hence we find that no MPs are detected in this cluster. This is surprising because in the first two papers of this series, we found evidence for MPs in four other SMC clusters (NGC 121; Lindsay 1, NGC 339, NGC 416), aged from 6 Gyr up to ∼10-11 Gyr. This finding raises the question whether age could play a major role in the MPs phenomenon. Additionally, our results appear to exclude mass or environment as the only key factors regulating the existence of a chemical enrichment, since all clusters studied so far in this survey are equally massive (∼1-2 x 105 M☉) and no particular patterns are found when looking at their spatial distribution in the SMC.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: abundances - Hertzsprung-Russell and colour-magnitude diagrams - galaxies: individual: SMC - galaxies: star clusters: individual: NGC 419 - galaxies: star clusters: individual: NGC 419

Simbad objects: 20

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Number of rows : 20
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NAME Wolf-Lundmark-Melotte G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 691 2
2 Cl Lindsay 1 Cl* 00 03 53.50 -73 28 15.0   11.7       ~ 119 0
3 ESO 28-19 Cl* 00 24 45.98 -72 47 37.9   11.6 12.05     ~ 148 0
4 NGC 121 GlC 00 26 49.0 -71 32 10   11.2 11.24     ~ 310 0
5 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11145 1
6 NGC 339 OpC 00 57 47.62 -74 28 14.6 13.23 12.94 12.21   11.20 ~ 144 0
7 NGC 416 Cl* 01 07 59.03 -72 21 20.5 12.73 12.55 11.76   10.71 ~ 147 1
8 NGC 419 OpC 01 08 17.26 -72 53 01.8 11.41 11.16 10.50   9.34 ~ 272 0
9 NAME Fornax Dwarf Spheroidal G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1741 1
10 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7062 0
11 NGC 1651 GlC 04 37 32.530 -70 35 08.71   12.99 12.28     ~ 122 0
12 NGC 1783 GlC 04 59 08.590 -65 59 15.84   10.9 10.93     ~ 253 0
13 NGC 1806 GlC 05 02 11.180 -67 59 05.89   11.1       ~ 157 0
14 NGC 1866 GlC 05 13 38.920 -65 27 52.75           ~ 421 0
15 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17428 0
16 NGC 1978 GlC 05 28 45.330 -66 14 12.04   10.7 10.70     ~ 308 0
17 NGC 2173 GlC 05 57 58 -72 58.7   12.74 11.88     ~ 141 0
18 NAME E 3 GlC 09 20 57.07 -77 16 54.8           ~ 164 0
19 C 1235-509 GlC 12 38 40.20 -51 09 01.0           ~ 376 0
20 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2186 2

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