2018MNRAS.476..114H

Query : 2018MNRAS.476..114H

2018MNRAS.476..114H - Mon. Not. R. Astron. Soc., 476, 114-121 (2018/May-1)

Kron 3: a fourth intermediate age cluster in the SMC with evidence of multiple populations.

HOLLYHEAD K., LARDO C., KACHAROV N., BASTIAN N., HILKER M., REJKUBA M., KOCH A., GREBEL E.K. and GEORGIEV I.

Abstract (from CDS):

We present the results of a spectroscopic study of the intermediate age (≃6.5 Gyr) massive cluster Kron 3 in the Small Magellanic Cloud. We measure CN and CH band strengths (at ≃3839 and 4300 Å, respectively) using VLT FORS2 spectra of 16 cluster members and find a sub-population of five stars enriched in nitrogen. We conclude that this is evidence for multiple populations in Kron 3, the fourth intermediate age cluster, after Lindsay 1, NGC 416 and NGC 339 (ages 6-8 Gyr), to display this phenomenon originally thought to be a unique characteristic of old globular clusters. At ≃6.5 Gyr this is one of the youngest clusters with multiple populations, indicating that the mechanism responsible for their onset must operate until a redshift of at least 0.75, much later than the peak of globular cluster formation at redshift ∼3.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): Magellanic Clouds - galaxies: star clusters: individual: Kron 3

VizieR on-line data: <Available at CDS (J/MNRAS/476/114): table1.dat>

Nomenclature: Table 1: [HLK2018] NNNN N=35 among (Nos 129-7963).

Simbad objects: 50

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Number of rows : 50
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 Cl Lindsay 1 Cl* 00 03 53.50 -73 28 15.0   11.7       ~ 125 0
2 [HLK2018] 329 * 00 24 16.029 -72 51 38.99     20.76     ~ 1 0
3 [HLK2018] 129 * 00 24 27.074 -72 52 17.65     20.95     ~ 1 0
4 [HLK2018] 2349 * 00 24 27.817 -72 48 23.22     20.15     ~ 1 0
5 [HLK2018] 225 * 00 24 32.520 -72 49 28.45     19.99     ~ 1 0
6 [HLK2018] 286 * 00 24 34.464 -72 52 29.60     19.57     ~ 1 0
7 [HLK2018] 2680 * 00 24 37.662 -72 48 15.23     20.14     ~ 1 0
8 [HLK2018] 6130 * 00 24 42.060 -72 46 45.34     20.18     ~ 1 0
9 ESO 28-19 Cl* 00 24 45.98 -72 47 37.9   11.6 12.05     ~ 152 0
10 [HLK2018] 1201 * 00 24 46.710 -72 48 54.04     20.83     ~ 1 0
11 [HLK2018] 6862 * 00 24 49.588 -72 46 24.20     19.90     ~ 1 0
12 [HLK2018] 791 * 00 24 49.916 -72 50 17.52     19.72     ~ 1 0
13 [HLK2018] 825 * 00 24 51.194 -72 49 06.28     20.57     ~ 1 0
14 [HLK2018] 3910 * 00 24 52.675 -72 47 44.38     19.98     ~ 1 0
15 [HLK2018] 3546 * 00 24 52.779 -72 47 53.05     20.08     ~ 1 0
16 [HLK2018] 5697 * 00 24 52.996 -72 46 56.86     20.28     ~ 1 0
17 [HLK2018] 599 * 00 24 54.216 -72 50 52.66     20.39     ~ 1 0
18 [HLK2018] 651 * 00 24 54.646 -72 50 44.63     19.91     ~ 1 0
19 [HLK2018] 3130 * 00 24 55.546 -72 48 03.71     19.91     ~ 1 0
20 [HLK2018] 7604 * 00 24 55.637 -72 45 59.22     20.23     ~ 1 0
21 [HLK2018] 4281 * 00 24 56.758 -72 47 35.02     20.66     ~ 1 0
22 [HLK2018] 7293 * 00 24 56.832 -72 46 10.99     20.01     ~ 1 0
23 [HLK2018] 842 * 00 24 57.912 -72 50 07.48     20.46     ~ 1 0
24 [HLK2018] 5174 * 00 24 58.932 -72 47 10.21     19.95     ~ 1 0
25 [HLK2018] 715 * 00 24 59.417 -72 50 30.05     21.12     ~ 1 0
26 [HLK2018] 6463 * 00 24 59.743 -72 46 35.69     20.26     ~ 1 0
27 [HLK2018] 905 * 00 25 01.732 -72 49 57.72     20.73     ~ 1 0
28 [HLK2018] 285 * 00 25 02.448 -72 51 47.92     20.76     ~ 1 0
29 [HLK2018] 514 * 00 25 02.527 -72 49 16.50     20.09     ~ 1 0
30 [HLK2018] 1903 * 00 25 04.289 -72 48 34.78     20.46     ~ 1 0
31 [HLK2018] 4873 * 00 25 04.963 -72 47 18.64     20.92     ~ 1 0
32 [HLK2018] 220 * 00 25 05.242 -72 51 57.78     21.18     ~ 1 0
33 [HLK2018] 4542 * 00 25 05.356 -72 47 27.02     20.11     ~ 1 0
34 [HLK2018] 1517 * 00 25 10.083 -72 48 45.18     20.42     ~ 1 0
35 [HLK2018] 176 * 00 25 10.535 -72 52 08.26     20.57     ~ 1 0
36 [HLK2018] 419 * 00 25 11.635 -72 51 22.43     20.16     ~ 1 0
37 [HLK2018] 7963 * 00 25 12.516 -72 45 44.57     20.04     ~ 1 0
38 NGC 121 GlC 00 26 49.0 -71 32 10   11.2 11.24     ~ 330 0
39 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
40 NGC 339 OpC 00 57 47.62 -74 28 14.6 13.23 12.94 12.21   11.20 ~ 157 0
41 NGC 416 Cl* 01 07 59.03 -72 21 20.5 12.73 12.55 11.76   10.71 ~ 156 1
42 NGC 419 OpC 01 08 17.26 -72 53 01.8 11.41 11.16 10.50   9.34 ~ 287 0
43 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
44 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
45 NGC 1806 GlC 05 02 11.180 -67 59 05.89   11.1       ~ 165 0
46 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
47 Cl Berkeley 39 OpC 07 46 48.1 -04 39 59           ~ 209 1
48 ESO 452-11 GlC 16 39 25.50 -28 23 52.0           ~ 89 0
49 NGC 6535 GlC 18 03 50.51 -00 17 51.5     9.85     ~ 320 0
50 NGC 6791 OpC 19 20 52.8 +37 46 40   10.52 9.5     ~ 1120 0

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