2018A&A...616A.187N

Query : 2018A&A...616A.187N

2018A&A...616A.187N - Astronomy and Astrophysics, volume 616A187-187 (2018/8-1)

Star clusters in the Magellanic Clouds. II. Age-dating, classification, and spatio-temporal distribution of the SMC clusters.

NAYAK P.K., SUBRAMANIAM A., CHOUDHURY S. and SAGAR R.

Abstract (from CDS):


Aims. We aim to estimate the age and reddening parameters of already identified star clusters within the Small Magellanic Cloud (SMC) in a consistent way using available photometric data, classify them based on their mass and strength, and study their spatiotemporal distribution.
Methods. We have used a semi-automated quantitative method, developed in the first paper of this series (Paper I, Nayak et al., 2016MNRAS.463.1446N), to estimate the cluster parameters using the V and I band photometric data from the Optical Gravitational Lensing Experiment (OGLE) III survey.
Results. We estimated parameters of 179 star clusters (17 are newly parameterised) and classified them into four groups. We present an online catalogue of parameters as well as cleaned and isochrone-fitted colour magnitude diagrams of 179 clusters.We compiled age information of 468 clusters by combining previous studies with our catalogue, to study their spatio-temporal distribution. Most of the clusters located in the southern part of the SMC are in the age range 600Myr-1.25Gyr, whereas, the clusters younger than 100Myr are mostly found in the northern SMC, with the central SMC showing continuous cluster formation. The peak of the cluster age distribution is identified at 130±35Myr, very similar to the Large Magellanic Cloud (LMC) in Paper I.
Conclusions. We suggest that the burst of cluster formation at 130Myr is due to the most recent LMC-SMC interaction. 90% of the studied sample is found to have mass <1700M☉, suggesting that the SMC is dominated by low mass clusters. There is tentative evidence for compact clusters in the LMC when compared to those in the Galaxy and the SMC. A progressive shifting of cluster location from the south to north of the SMC is identified in last ∼600Myr. The details of spatio-temporal distribution of clusters presented in two videos as part of this study can be used as a tool to constrain details of the recent LMC-SMC interactions.

Abstract Copyright: © ESO 2018

Journal keyword(s): Magellanic Clouds - galaxies: star clusters: general - galaxies: star formation

VizieR on-line data: <Available at CDS (J/A+A/616/A187): table2.dat>

Simbad objects: 187

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Number of rows : 187
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 Bruck 6 Cl* 00 27 57 -74 24.0           ~ 10 0
2 [RZ2005] 7 OpC 00 30 00.26 -73 22 40.7 15.46 14.92 13.84   12.52 ~ 31 0
3 NAME Magellanic Stream HVC 00 32 -30.0           ~ 1079 1
4 HW 8 Cl* 00 33 47.92 -73 37 58.3 13.96 14.09 13.83   13.37 ~ 17 0
5 NGC 176 Cl* 00 35 58.68 -73 09 56.5 12.76 13.06 13.01   13.09 ~ 33 0
6 HW 11 Cl* 00 37 31.74 -73 36 49.3 14.81 14.67 14.31   13.93 ~ 16 0
7 Cl Lindsay 19 Cl* 00 37 41.78 -73 54 19.7 13.70 14.78 13.18   12.17 ~ 36 0
8 Bruck 14 Cl* 00 38 34.97 -73 48 21.7 14.10 14.50 14.37   13.79 ~ 11 0
9 HW 12 Cl* 00 38 51.28 -73 22 27.1           ~ 13 0
10 OGLE-CL SMC 164 Cl* 00 38 55.55 -73 24 31.7           ~ 8 0
11 OGLE-CL SMC 6 Cl* 00 39 33.12 -73 10 37.2           ~ 9 0
12 [RZ2005] 22 OpC 00 40 12.67 -72 41 54.9 14.53 14.42 13.96   13.34 ~ 19 0
13 NGC 222 OpC 00 40 42.11 -73 23 00.8 12.63 12.84 12.64   12.31 ~ 32 0
14 Bruck 26 Cl* 00 40 44.77 -73 44 26.4           ~ 10 0
15 NGC 220 OpC 00 40 55.96 -73 24 10.1 14.24 14.61 14.39   14.49 ~ 34 0
16 Cl Kron 17 OpC 00 41 01 -72 34.3   12.7       ~ 20 0
17 NGC 231 OpC 00 41 07.24 -73 20 58.4 13.01 13.14 12.87   12.62 ~ 33 0
18 HW 16 Cl* 00 42 37.22 -73 43 52.5 13.76 14.38 14.39   14.42 ~ 17 0
19 OGLE-CL SMC 15 As* 00 42 54.13 -73 17 37.0           ~ 11 0
20 NGC 241 Cl* 00 43 32.74 -73 26 25.4           ~ 26 1
21 NGC 242 OpC 00 43 37.57 -73 26 37.9   12.1       ~ 38 1
22 OGLE-CL SMC 21 Cl* 00 43 42.26 -72 58 40.7 16.52 16.18 15.29   14.34 ~ 16 0
23 [BS95] 25 As* 00 44 46 -72 53.9           ~ 7 0
24 OGLE-CL SMC 177 Cl* 00 44 55.05 -73 10 27.4           ~ 12 0
25 OGLE-CL SMC 25 Cl* 00 45 10.64 -73 13 17.6 13.63 13.78 13.44   13.11 ~ 16 0
26 Bruck 39 Cl* 00 45 28.06 -73 28 50.7 14.97 14.60 14.13   13.33 ~ 19 0
27 NGC 256 OpC 00 45 54.11 -73 30 23.9 12.67 12.75 12.50   12.02 ~ 38 0
28 OGLE-CL SMC 182 Cl* 00 46 01.63 -73 23 44.4           ~ 10 0
29 NAME OGLE-CL SMC 33s Cl* 00 46 12.0 -73 23 39           ~ 6 0
30 Bruck 40 Em* 00 46 15.41 -72 35 15.8     16.2     ~ 5 0
31 [H86] 88 Cl* 00 46 58.8 -73 20 10           ~ 8 0
32 [MA93] 163 Em* 00 47 11.4 -73 28 37 12.50 12.52 12.17   11.47 ~ 56 0
33 OGLE-CL SMC 41 Cl* 00 47 25.55 -72 50 37.5 13.92 14.22 13.97   13.64 ~ 15 0
34 [H86] 94 Cl* 00 47 53 -73 31.9           ~ 7 0
35 OGLE-CL SMC 43 Cl* 00 47 53.42 -73 13 14.1 13.74 13.18 12.71   12.19 ~ 24 0
36 OGLE-CL SMC 45 OpC 00 48 02.85 -73 29 17.8 14.21 14.20 14.00   13.78 ~ 27 0
37 NGC 269 Cl* 00 48 22.25 -73 31 48.8 13.05 12.98 12.59   11.90 ~ 37 0
38 [H86] 101 Cl* 00 48 32 -72 45.7           ~ 6 0
39 OGLE-CL SMC 193 As* 00 48 36.55 -73 10 45.2           ~ 9 0
40 OGLE-CL SMC 51 Cl* 00 49 04.79 -73 03 03.8           ~ 9 0
41 OGLE-CL SMC 194 Cl* 00 49 05.58 -73 21 09.8           ~ 12 0
42 Cl Lindsay 39 Cl* 00 49 16.16 -73 22 18.6 12.93 12.84 12.53   12.30 ~ 30 0
43 OGLE-CL SMC 196 Cl* 00 49 26.81 -73 23 55.2           ~ 10 0
44 OGLE-CL SMC 56 As* 00 49 36.29 -72 50 12.7           ~ 9 0
45 HW 26 As* 00 49 38 -73 42.5           ~ 8 0
46 Bruck 52 Cl* 00 49 39.75 -73 03 31.7           ~ 14 0
47 [H86] 110 As* 00 49 44 -72 51.2           ~ 8 0
48 OGLE-CL SMC 58 Cl* 00 49 45.43 -72 51 58.0           ~ 14 0
49 Bruck 53 Cl* 00 50 03.82 -73 23 03.9           ~ 14 0
50 OGLE-CL SMC 198 Cl* 00 50 07.51 -73 11 25.9           ~ 12 0
51 Bruck 54 Cl* 00 50 27.83 -73 12 24.9 15.11 15.20 15.07   15.26 ~ 14 0
52 [H86] 114 Cl* 00 50 34.83 -72 39 02.0 14.22 14.44 14.08   13.73 ~ 10 0
53 OGLE-CL SMC 64 Cl* 00 50 39.55 -72 57 54.8           ~ 16 0
54 LI-SMC 74 Cl* 00 50 55.15 -72 43 37.5 12.28 12.55 11.87   10.25 ~ 22 0
55 Bruck 56 Cl* 00 50 55.39 -73 12 11.0           ~ 14 0
56 OGLE-CL SMC 202 Cl* 00 50 58.65 -73 30 13.1           ~ 8 0
57 OGLE-CL SMC 203 Cl* 00 51 10.30 -73 35 23.7           ~ 8 0
58 NGC 290 Cl* 00 51 12.33 -73 09 42.1 11.91 12.10 11.71   11.09 ~ 39 0
59 [BS95] 52 As* 00 51 29 -73 41.5           ~ 6 0
60 Bruck 57 Cl* 00 51 31.78 -73 00 38.3           ~ 12 0
61 OGLE-CL SMC 73 Cl* 00 51 44.13 -72 50 23.3 13.41 13.63 13.25   12.67 ~ 15 0
62 OGLE-CL SMC 207 Cl* 00 51 48.80 -72 32 27.6           ~ 9 0
63 OGLE-CL SMC 74 OpC 00 51 58.17 -72 57 20.7 12.48 12.67 12.23   11.74 ~ 32 0
64 OGLE-CL SMC 76 Cl* 00 52 12.47 -72 31 51.2           ~ 12 0
65 [RZ2005] 73 OpC 00 52 36.07 -72 11 36.5 12.28 12.74 12.12   10.94 ~ 21 0
66 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
67 Bruck 65 Cl* 00 52 45.25 -72 59 01.5 12.81 13.21 12.98   12.74 ~ 16 0
68 Bruck 67 Cl* 00 52 48.37 -73 24 41.4 13.92 14.02 13.39   12.57 ~ 17 0
69 Bruck 69 Cl* 00 53 04.81 -72 37 25.8 12.71 13.51 13.44   13.48 ~ 15 0
70 OGLE-CL SMC 91 Cl* 00 53 09.45 -72 34 25.7 16.16 16.25 15.74   15.21 ~ 14 0
71 NGC 299 Cl* 00 53 24.74 -72 11 47.6 11.71 12.05 11.73   10.67 ~ 41 0
72 [H86] 145 Cl* 00 53 37 -72 21.0           ~ 10 0
73 Bruck 73 Em* 00 53 42.31 -72 39 14.6   14.61 14.6     ~ 17 0
74 [H86] 146 As* 00 53 43 -72 23.3           ~ 9 0
75 OGLE-CL SMC 216 Cl* 00 53 50.13 -72 53 47.0           ~ 13 0
76 Bruck 74 Cl* 00 53 58 -72 12.0           ~ 7 0
77 NGC 306 Cl* 00 54 14.31 -72 14 27.3 12.08 12.23 12.07   11.40 ~ 33 0
78 OGLE-CL SMC 218 Cl* 00 54 22.73 -72 41 41.1           ~ 8 0
79 Bruck 78 Cl* 00 54 46.13 -72 07 32.4 14.17 14.47 14.63   14.66 ~ 11 0
80 Bruck 79 Cl* 00 54 48.50 -72 27 53.6 12.76 12.99 12.85   12.55 ~ 23 0
81 ESO 51-7 Cl* 00 54 54.21 -72 06 48.0 12.71 13.01 13.07   11.70 ~ 19 0
82 [H86] 150 Cl* 00 54 57 -73 25.0           ~ 5 0
83 OGLE-CL SMC 101 Cl* 00 55 12.32 -73 17 52.1 16.05 15.84 15.50   14.87 ~ 11 0
84 [RZ2005] 93 Cl* 00 55 17.06 -73 30 05.4 14.37 14.44 14.11   13.64 ~ 12 0
85 Bruck 83 Cl* 00 55 29.85 -73 04 31.8 13.16 13.00 12.43   11.78 ~ 13 0
86 OGLE-CL SMC 104 OpC 00 55 33.18 -72 50 00.1 13.34 13.25 12.89   12.20 ~ 35 0
87 Bruck 82 Cl* 00 55 36 -71 59.0           ~ 8 0
88 [BS95] 76 Cl* 00 55 39 -71 55.3           ~ 8 0
89 OGLE-CL SMC 221 Cl* 00 55 44.75 -72 42 18.2           ~ 9 0
90 [H86] 157 Cl* 00 55 47 -73 27.8           ~ 6 0
91 [H86] 170 Cl* 00 56 20 -72 21.2           ~ 8 0
92 OGLE-CL SMC 108 Cl* 00 56 34.48 -72 30 08.3           ~ 9 0
93 [H86] 171 Cl* 00 56 39 -72 13.0           ~ 5 0
94 OGLE-CL SMC 225 Cl* 00 57 17.80 -72 56 01.3           ~ 12 0
95 LHA 115-S 26 Cl* 00 57 30.00 -72 15 53.0 11.29       11.34 ~ 42 1
96 OGLE-CL SMC 110 Cl* 00 57 46.14 -72 42 20.9           ~ 9 0
97 OGLE-CL SMC 227 Cl* 00 57 50.23 -72 26 23.6           ~ 13 0
98 OGLE-CL SMC 112 Cl* 00 57 57.14 -72 26 42.0           ~ 12 0
99 Bruck 92 Cl* 00 58 14 -72 00.2           ~ 7 0
100 OGLE-CL SMC 228 Cl* 00 58 19.42 -72 17 56.6           ~ 12 0
101 OGLE-CL SMC 115 Cl* 00 58 33.64 -72 16 51.6           ~ 12 0
102 HW 35 Cl* 00 58 42 -73 35.0           ~ 9 0
103 HW 37 Cl* 00 59 14.83 -71 46 08.9 13.58 13.48 13.45   13.05 ~ 12 0
104 Bruck 96 Cl* 00 59 15.32 -72 36 27.8 14.47 14.52 14.26   13.88 ~ 16 0
105 IC 1611 OpC 00 59 48.73 -72 20 01.4 12.14 12.26 11.96   11.33 ~ 35 0
106 OGLE-CL SMC 119 Cl* 00 59 56.87 -72 22 24.4           ~ 17 0
107 IC 1612 OpC 01 00 00.26 -72 22 18.2 12.59 12.84 12.31   11.33 ~ 31 0
108 OGLE-CL SMC 121 As* 01 00 13.47 -72 27 40.8 12.97 13.53 13.26   12.72 ~ 15 0
109 Bruck 100 Cl* 01 00 23 -72 05.1           ~ 9 0
110 Bruck 99 Cl* 01 00 30.52 -73 05 14.4 14.39 14.19 13.78   13.14 ~ 21 0
111 OGLE-CL SMC 124 Cl* 01 00 33.87 -72 21 50.8 12.25 12.71 12.54   12.03 ~ 28 0
112 OGLE-CL SMC 125 As* 01 00 46.75 -72 55 41.4           ~ 8 0
113 [RZ2005] 126 OpC 01 00 49.42 -73 20 57.0 13.60 13.56 13.18   12.47 ~ 17 0
114 Bruck 103 Cl* 01 01 00.12 -73 09 22.2 14.74 14.67 14.46   13.56 ~ 11 0
115 OGLE-CL SMC 126 Cl* 01 01 00.39 -72 44 59.6 14.24 14.54 14.32   13.96 ~ 20 0
116 HW 43 Cl* 01 01 07.13 -71 45 14.0 14.68 14.36 14.26   13.87 ~ 14 0
117 HW 42 As* 01 01 08 -74 04.4           ~ 18 0
118 [BS95] 102 Cl* 01 01 14 -73 47.8           ~ 6 0
119 OGLE-CL SMC 127 Cl* 01 01 17.78 -72 13 42.3           ~ 13 0
120 HW 44 Cl* 01 01 22 -73 47.2           ~ 11 0
121 Bruck 107 As* 01 01 44 -71 39.7           ~ 7 0
122 OGLE-CL SMC 129 Cl* 01 01 44.80 -72 33 51.2 11.12 11.50 11.47   11.38 ~ 28 0
123 Bruck 112 Cl* 01 02 23 -72 00.2           ~ 14 0
124 [BS95] 105 As* 01 02 30 -72 37.7           ~ 6 0
125 OGLE-CL SMC 133 Cl* 01 02 31.86 -72 19 05.3 15.88 15.80 14.92   13.81 ~ 17 0
126 OGLE-CL SMC 233 Cl* 01 02 40.02 -72 23 50.2           ~ 9 0
127 NAME Cl Lindsay 69E Cl* 01 02 49.0 -73 44 25           ~ 5 0
128 Bruck 114 Cl* 01 02 53.16 -72 24 53.1           ~ 12 0
129 Bruck 113 Cl* 01 02 55.75 -73 20 18.6 18.04 15.60 14.21   13.20 ~ 12 0
130 OGLE-CL SMC 134 OpC 01 03 11.53 -72 16 23.5 12.94 13.40 13.56   13.61 ~ 30 0
131 OGLE-CL SMC 137 Cl* 01 03 21.86 -72 39 08.1 12.46 13.06 13.10   13.23 ~ 17 0
132 [BS95] 110 As* 01 03 29 -73 02.7           ~ 6 0
133 NGC 376 Cl* 01 03 50.21 -72 49 33.5 10.83 11.16 10.90   10.17 ~ 57 0
134 OGLE-CL SMC 138 As* 01 03 53.02 -72 06 10.5           ~ 11 0
135 Bruck 118 Cl* 01 04 13 -73 01.9           ~ 4 0
136 [BS95] 122 Cl* 01 04 18 -73 10.3           ~ 5 0
137 OGLE-CL SMC 237 Cl* 01 04 22.49 -72 50 51.9           ~ 27 0
138 [BS95] 123 As* 01 04 28 -72 11.1           ~ 8 0
139 Bruck 121 Cl* 01 04 30.49 -72 37 06.4 14.24 14.46 14.12   13.64 ~ 17 0
140 ESO 51-15 OpC 01 04 36.20 -72 09 36.7 11.64 12.14 12.26   12.48 ~ 29 0
141 HW 48 Cl* 01 04 59.50 -73 38 17.0 14.64 14.83 14.71   14.56 ~ 11 0
142 Bruck 124 Cl* 01 05 02.66 -73 02 32.7           ~ 11 0
143 LHA 115-N 78B Em* 01 05 04.03680 -71 59 25.5588         18.893 ~ 22 0
144 OGLE-CL SMC 147 Cl* 01 05 07.95 -71 59 45.1           ~ 14 0
145 IC 1624 Cl* 01 05 21.892 -72 02 33.31 12.56 12.60 12.42   11.98 ~ 34 0
146 [BS95] 128 Cl* 01 05 34 -73 29.2           ~ 7 0
147 Bruck 128 Cl* 01 05 51.42 -71 57 07.6 15.31 15.15 14.29   13.59 ~ 11 0
148 OGLE-CL SMC 150 Cl* 01 06 02.41 -72 20 30.8 13.11 13.67 13.37   12.77 ~ 11 0
149 HW 50 Cl* 01 06 03 -71 42.7           ~ 10 0
150 IC 1626 OpC 01 06 14.55 -73 17 51.0 14.16 14.01 13.82   13.40 ~ 16 0
151 ESO 29-31 OpC 01 06 47.31 -72 16 23.7 11.88 12.29 11.47   9.99 ~ 24 0
152 [BS95] 136 As* 01 06 48 -71 54.9           ~ 7 0
153 [RZ2005] 159 Cl* 01 06 54.58 -71 41 25.3 14.25 14.15 13.94   13.46 ~ 10 0
154 HW 52 Cl* 01 06 56.28 -73 14 09.1 14.06 14.14 13.97   13.74 ~ 13 0
155 HW 53 Cl* 01 07 00.73 -73 34 36.6 17.36 17.30 16.67   16.00 ~ 13 0
156 Bruck 129 As* 01 07 04.47 -72 37 22.3 13.58 13.80 13.23   11.92 ~ 14 0
157 HW 55 Cl* 01 07 20.76 -73 22 37.5 15.91 15.24 14.67   14.05 ~ 17 0
158 OGLE-CL SMC 155 OpC 01 07 27.87 -72 29 36.5 13.86 14.25 14.08   13.72 ~ 19 0
159 OGLE-CL SMC 156 Cl* 01 07 29.50 -72 46 05.4 12.87 13.09 12.94   12.51 ~ 24 0
160 OGLE-CL SMC 157 Cl* 01 07 32.56 -73 07 17.1 14.24 14.11 13.76   13.47 ~ 23 0
161 [RZ2005] 173 OpC 01 08 13.77 -73 15 27.0 14.81 14.42 13.97   12.83 ~ 19 0
162 [H86] 196 Cl* 01 08 25 -71 50.3           ~ 6 0
163 OGLE-CL SMC 161 OpC 01 09 03.68 -73 05 13.8 14.44 14.42 13.96   13.15 ~ 19 0
164 NGC 422 OpC 01 09 24.50 -71 45 59.0 13.56 13.45 13.26   12.83 ~ 33 0
165 HW 61 Cl* 01 09 44.61 -72 17 47.7           ~ 12 0
166 [BS95] 276 Cl* 01 10 05.20 -72 44 15.5 14.32 14.34 14.09   13.56 ~ 9 0
167 Bruck 137 Cl* 01 10 30 -72 57.4           ~ 7 0
168 HW 64 Cl* 01 10 45.97 -71 20 17.7 13.10 13.60 13.54   13.47 ~ 18 0
169 [RZ2005] 185 OpC 01 10 48.07 -72 47 35.9 14.04 14.17 13.81   13.36 ~ 18 0
170 IC 1655 Cl* 01 11 53.97 -71 19 48.4 13.92 14.10 14.00   13.85 ~ 18 0
171 [BS95] 152 As* 01 12 18.74 -72 26 58.3 14.33 14.62 14.49   14.48 ~ 6 0
172 IC 1662 Cl* 01 12 33.33 -73 27 22.6 13.93 14.18 14.03   13.73 ~ 14 0
173 IC 1660 OpC 01 12 37.37 -71 45 41.8 13.73 13.68 13.51   13.07 ~ 22 0
174 [RZ2005] 194 Cl* 01 12 51.74 -73 07 10.9 14.66 14.52 13.80   12.83 ~ 26 0
175 Cl Lindsay 95 Cl* 01 14 45 -71 20.8   14.3       ~ 15 0
176 NGC 458 OpC 01 14 52.94 -71 33 00.0 11.86 11.85 11.66   11.23 ~ 79 0
177 HW 70 Cl* 01 14 55.88 -72 12 22.4 15.79 15.91 15.66   14.99 ~ 9 0
178 NAME HW 71SE Cl* 01 15 31.56 -72 22 46.7 14.08 14.46 14.12   13.61 ~ 7 0
179 Cl Kron 68 OpC 01 15 33.25 -72 37 24.1 14.49 14.68 14.60   14.58 ~ 14 0
180 SK 157 * 01 15 52.196 -73 20 48.32 11.13 12.97 13.66     O9.5 42 0
181 HW 73 Cl* 01 16 24.85 -71 19 38.5 13.78 14.02 13.76   13.35 ~ 16 0
182 HW 75 As* 01 17 30.46 -73 34 16.1 14.47 14.97 14.60   14.09 ~ 12 0
183 Bruck 158 Cl* 01 20 10 -72 37.2           ~ 10 0
184 HW 82 Cl* 01 24 28 -73 10.3           ~ 13 1
185 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
186 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
187 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0

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