2017MNRAS.465L..39H

Query : 2017MNRAS.465L..39H

2017MNRAS.465L..39H - Mon. Not. R. Astron. Soc., 465, L39-L43 (2017/February-2)

Evidence for multiple populations in the intermediate-age cluster Lindsay 1 in the SMC.

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

Abstract (from CDS):

Lindsay 1 is an intermediate-age (≃8 Gyr) massive cluster in the Small Magellanic Cloud. Using VLT FORS2 spectra of 16 probable cluster members on the lower red giant branch of the cluster, we measure CN and CH band strengths (at ≃ 3883 and 4300 Å, respectively), along with carbon and nitrogen abundances and find that a sub-population of stars has significant nitrogen enrichment. A lack of spread in carbon abundances excludes evolutionary mixing as the source of this enrichment, so we conclude that this is evidence of multiple populations. Therefore, Lindsay 1 is the youngest cluster to show such variations, implying that the process triggering the onset of multiple populations must operate until at least redshift ∼1.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): Magellanic Clouds - galaxies: star clusters: individual: Lindsay 1 - galaxies: star clusters: individual: Lindsay 1

VizieR on-line data: <Available at CDS (J/MNRAS/465/L39): table1.dat>

Nomenclature: Table 1: [HKL2017] NNNN N=34 among (Nos 8-5589).

Simbad objects: 38

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Number of rows : 38
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 [HKL2017] 5376 RG* 00 03 14.9813804376 -73 26 41.717627844     20.10   19.29 ~ 1 0
2 [HKL2017] 1203 RG* 00 03 17.3904912936 -73 29 11.803654644     20.22   19.40 ~ 1 0
3 [HKL2017] 1831 RG* 00 03 21.8516873496 -73 28 49.282422384     20.55   19.77 ~ 1 0
4 [HKL2017] 3393 RG* 00 03 22.3888558536 -73 27 57.840918048     20.50   19.76 ~ 1 0
5 [HKL2017] 4840 RG* 00 03 30.2305385688 -73 27 09.025709796     19.67   18.83 ~ 1 0
6 [HKL2017] 74 RG* 00 03 31.7500271376 -73 32 16.666222740     20.31   19.54 ~ 1 0
7 [HKL2017] 4478 RG* 00 03 32.7070012224 -73 27 22.334016924     20.20   19.39 ~ 1 0
8 [HKL2017] 3712 RG* 00 03 32.9682749904 -73 27 47.999405916     20.71   19.91 ~ 1 0
9 [HKL2017] 8 RG* 00 03 33.8423675040 -73 33 16.885333152     20.05   18.29 ~ 1 0
10 [HKL2017] 5059 RG* 00 03 35.987 -73 26 59.22     20.15   19.39 ~ 1 0
11 [HKL2017] 709 RG* 00 03 37.7510937120 -73 29 31.770856536     19.59   18.76 ~ 1 0
12 [HKL2017] 4024 RG* 00 03 38.3263012176 -73 27 37.892299428     19.94   19.16 ~ 1 0
13 [HKL2017] 178 RG* 00 03 41.7034151184 -73 31 05.917227888     19.64   18.83 ~ 1 0
14 [HKL2017] 3041 RG* 00 03 43.234 -73 28 08.73     20.22   19.42 ~ 1 0
15 [HKL2017] 954 RG* 00 03 44.8120504584 -73 29 21.272878176     20.49   19.70 ~ 1 0
16 [HKL2017] 158 RG* 00 03 44.8171579032 -73 31 15.474888444     19.40   18.60 ~ 1 0
17 [HKL2017] 249 RG* 00 03 47.0843125152 -73 30 33.292654092     20.26   19.41 ~ 1 0
18 [HKL2017] 124 RG* 00 03 48.9847632216 -73 31 35.648921172     21.19   20.58 ~ 1 0
19 [HKL2017] 5230 RG* 00 03 53.2215203904 -73 26 50.804919600     20.09   19.30 ~ 1 0
20 Cl Lindsay 1 Cl* 00 03 53.50 -73 28 15.0   11.7       ~ 125 0
21 [HKL2017] 225 RG* 00 03 54.3686387712 -73 30 44.024088744     19.73   18.83 ~ 1 0
22 [HKL2017] 229 RG* 00 03 56.2352199864 -73 29 59.162313624     19.74   18.91 ~ 1 0
23 [HKL2017] 98 RG* 00 03 57.4493006616 -73 30 08.841299616     20.17   19.38 ~ 1 0
24 [HKL2017] 5589 RG* 00 03 58.2370482168 -73 26 24.977532048     19.67   18.88 ~ 1 0
25 [HKL2017] 101 RG* 00 03 59.7960209520 -73 31 54.859901340     20.69   18.55 ~ 1 0
26 [HKL2017] 384 RG* 00 04 00.8681830944 -73 29 49.325028612     20.81   20.05 ~ 1 0
27 [HKL2017] 2564 RG* 00 04 01.3499412216 -73 28 24.173424948     20.35   19.56 ~ 1 0
28 [HKL2017] 2789 RG* 00 04 01.901 -73 28 16.56     19.67   18.84 ~ 1 0
29 [HKL2017] 140 RG* 00 04 02.091 -73 31 23.19     21.60   21.17 ~ 1 0
30 [HKL2017] 5499 RG* 00 04 04.5194904072 -73 26 32.187982236     19.79   18.99 ~ 1 0
31 [HKL2017] 203 RG* 00 04 06.344 -73 30 53.75     20.86   20.57 ~ 1 0
32 [HKL2017] 511 RG* 00 04 12.623 -73 29 41.32     20.29   19.51 ~ 1 0
33 [HKL2017] 2230 RG* 00 04 13.7854745136 -73 28 35.197427028     20.61   19.84 ~ 1 0
34 [HKL2017] 1451 RG* 00 04 14.5153819440 -73 29 02.108809896     21.34   20.61 ~ 1 0
35 [HKL2017] 48 RG* 00 04 16.6184240208 -73 32 32.704558116     20.07   19.19 ~ 1 0
36 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
37 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
38 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0

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