2013MNRAS.431.2917D

Query : 2013MNRAS.431.2917D

2013MNRAS.431.2917D - Mon. Not. R. Astron. Soc., 431, 2917-2932 (2013/May-3)

The NGC 5253 star cluster system - I. Standard modelling and infrared-excess sources.

DE GRIJS R., ANDERS P., ZACKRISSON E. and OSTLIN G.

Abstract (from CDS):

Using high-resolution Hubble Space Telescope data, we re-examine the fundamental properties (ages, masses and extinction values) of the rich star cluster population in the dwarf starburst galaxy NGC 5253. The gain in resolution compared to previous studies is of order a factor of 2 in both spatial dimensions, while our accessible wavelength range transcends previous studies by incorporation of both near-ultraviolet and near-infrared (IR) passbands. We apply spectral synthesis treatments based on two different simple stellar population model suites to our set of medium-, broad-band and Hα images to gain an improved physical understanding of the IR-excess flux found for a subset of young clusters (30 of 149). With the caveat that our models are based on fully sampled stellar mass functions, the NGC 5253 cluster population is dominated by a significant number of relatively low-mass (Mcl ≲ afewx104M☉) objects with ages ranging from a few x106 to a few x107 yr, which is in excellent agreement with the starburst age of the host galaxy. The IR-excess clusters are almost all found in this young age range and have masses of up to a few x104M☉. The IR excess in the relatively low-mass NGC 5253 clusters is most likely caused by a combination of stochastic sampling effects and colour variations due to the presence of either luminous red or pre-main-sequence stars. We also find a small number of intermediate-age ( ∼ 1 Gyr old), ∼ 105M☉ clusters, as well as up to a dozen massive, ∼ 10 Gyr old globular clusters. Their presence supports the notion that NGC 5253 is a very active galaxy that has undergone multiple episodes of star cluster formation.

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

Journal keyword(s): methods: data analysis - stars: luminosity function, mass function - galaxies: starburst - galaxies: star clusters: general - infrared: galaxies

VizieR on-line data: <Available at CDS (J/MNRAS/431/2917): table2.dat table3.dat>

Nomenclature: Tables 2-3: [DAZ2013] NNN (Nos 0-181).

Simbad objects: 188

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Number of rows : 188
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 ESO 350-38 Sy2 00 36 52.489 -33 33 17.23   14.31 14.41 13.49   ~ 450 0
2 NGC 3256 Sy2 10 27 51.284 -43 54 13.55   11.83 11.33 10.62 11.9 ~ 920 2
3 NAME Cen A Group GrG 13 20 33.9 -44 58 51           ~ 274 0
4 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
5 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4565 4
6 [DAZ2013] 0 Cl* 13 39 54.3331099320 -31 38 33.665149392           ~ 2 0
7 [DAZ2013] 1 Cl* 13 39 54.6198 -31 38 33.740           ~ 2 0
8 [DAZ2013] 5 Cl* 13 39 54.8507590368 -31 38 32.960301684           ~ 2 0
9 [DAZ2013] 4 Cl* 13 39 55.0182 -31 38 28.234           ~ 2 0
10 [DAZ2013] 6 Cl* 13 39 55.0304 -31 38 32.576           ~ 1 0
11 [DAZ2013] 42 Cl* 13 39 55.2159 -31 38 39.387           ~ 2 0
12 [DAZ2013] 52 Cl* 13 39 55.2597 -31 38 39.686           ~ 2 0
13 [DAZ2013] 18 Cl* 13 39 55.2608 -31 38 31.464           ~ 2 0
14 [DAZ2013] 28 Cl* 13 39 55.2834 -31 38 33.578           ~ 2 0
15 [DAZ2013] 59 Cl* 13 39 55.3119 -31 38 39.411           ~ 2 0
16 [DAZ2013] 37 Cl* 13 39 55.3136 -31 38 36.149           ~ 2 0
17 [DAZ2013] 79 Cl* 13 39 55.3352 -31 38 41.951           ~ 2 0
18 [DAZ2013] 54 Cl* 13 39 55.3573 -31 38 37.153           ~ 1 0
19 [DAZ2013] 7 Cl* 13 39 55.3727 -31 38 23.662           ~ 2 0
20 [DAZ2013] 8 Cl* 13 39 55.3794 -31 38 24.086           ~ 2 0
21 [DAZ2013] 64 Cl* 13 39 55.3815 -31 38 38.311           ~ 1 0
22 [DAZ2013] 2 Cl* 13 39 55.3851965856 -31 38 11.978319192           ~ 2 0
23 [DAZ2013] 71 Cl* 13 39 55.3959 -31 38 39.114           ~ 2 0
24 [DAZ2013] 67 Cl* 13 39 55.4034 -31 38 38.478           ~ 2 0
25 [DAZ2013] 35 Cl* 13 39 55.4036 -31 38 33.198           ~ 1 0
26 [DAZ2013] 83 Cl* 13 39 55.4106 -31 38 41.033           ~ 2 0
27 [DAZ2013] 23 Cl* 13 39 55.4110 -31 38 28.698           ~ 2 0
28 [DAZ2013] 65 Cl* 13 39 55.4211 -31 38 37.527           ~ 2 0
29 [DAZ2013] 12 Cl* 13 39 55.4403 -31 38 25.177           ~ 2 0
30 [DAZ2013] 3 Cl* 13 39 55.4505 -31 38 12.535           ~ 2 0
31 [DAZ2013] 46 Cl* 13 39 55.4557 -31 38 33.458           ~ 1 0
32 [DAZ2013] 36 Cl* 13 39 55.456 -31 38 34.28           ~ 9 0
33 [DAZ2013] 24 Cl* 13 39 55.4658 -31 38 27.250           ~ 2 0
34 [DAZ2013] 9 Cl* 13 39 55.4818 -31 38 23.376           ~ 3 0
35 [DAZ2013] 58 Cl* 13 39 55.4829 -31 38 34.604           ~ 2 0
36 [DAZ2013] 49 Cl* 13 39 55.4904 -31 38 33.138           ~ 1 0
37 [DAZ2013] 48 Cl* 13 39 55.4990 -31 38 32.779           ~ 1 0
38 [DAZ2013] 14 Cl* 13 39 55.4993 -31 38 23.872           ~ 1 0
39 [HCG2004] NGC 5253 C 18 Cl* 13 39 55.5082 -31 38 24.918           ~ 2 0
40 [DAZ2013] 17 Cl* 13 39 55.5108 -31 38 24.265           ~ 2 0
41 [DAZ2013] 25 Cl* 13 39 55.5189 -31 38 25.967           ~ 2 0
42 [DAZ2013] 41 Cl* 13 39 55.5216 -31 38 30.954           ~ 1 0
43 [DAZ2013] 91 Cl* 13 39 55.5237 -31 38 39.044           ~ 2 0
44 [DAZ2013] 38 Cl* 13 39 55.53 -31 38 29.7           ~ 18 0
45 [DAZ2013] 31 Cl* 13 39 55.5302 -31 38 29.292           ~ 1 0
46 [DAZ2013] 63 Cl* 13 39 55.5390 -31 38 33.825           ~ 1 0
47 [HCG2004] NGC 5253 C 11 Cl* 13 39 55.5442 -31 38 23.970           ~ 2 0
48 [DAZ2013] 70 Cl* 13 39 55.5449 -31 38 34.906           ~ 2 0
49 [DAZ2013] 119 Cl* 13 39 55.5602 -31 38 42.851           ~ 2 0
50 [DAZ2013] 33 Cl* 13 39 55.5634 -31 38 28.715           ~ 2 0
51 [DAZ2013] 29 Cl* 13 39 55.5705 -31 38 26.357           ~ 2 0
52 [DAZ2013] 34 Cl* 13 39 55.5761 -31 38 28.387           ~ 2 0
53 [DAZ2013] 45 Cl* 13 39 55.58 -31 38 29.4           ~ 15 0
54 [DAZ2013] 26 Cl* 13 39 55.5815 -31 38 24.333           ~ 2 0
55 [DAZ2013] 53 Cl* 13 39 55.5935 -31 38 30.573           ~ 2 0
56 [DAZ2013] 57 Cl* 13 39 55.5943 -31 38 31.253           ~ 2 0
57 [DAZ2013] 89 Cl* 13 39 55.5962 -31 38 36.804           ~ 2 0
58 [DAZ2013] 102 Cl* 13 39 55.6006 -31 38 38.259           ~ 2 0
59 [DAZ2013] 98 Cl* 13 39 55.6107 -31 38 37.276           ~ 2 0
60 [DAZ2013] 68 Cl* 13 39 55.6188 -31 38 32.612           ~ 2 0
61 [DAZ2013] 16 Cl* 13 39 55.6290 -31 38 20.718           ~ 2 0
62 [DAZ2013] 30 Cl* 13 39 55.6319 -31 38 25.090           ~ 2 0
63 [DAZ2013] 62 Cl* 13 39 55.6379 -31 38 31.006           ~ 1 0
64 [DAZ2013] 27 Cl* 13 39 55.6494 -31 38 23.218           ~ 2 0
65 [DAZ2013] 107 Cl* 13 39 55.7016 -31 38 36.578           ~ 2 0
66 [DAZ2013] 47 Cl* 13 39 55.7112 -31 38 26.868           ~ 2 0
67 [DAZ2013] 56 Cl* 13 39 55.7120 -31 38 27.915           ~ 1 0
68 [DAZ2013] 111 Cl* 13 39 55.7135 -31 38 37.047           ~ 1 0
69 [DAZ2013] 55 Cl* 13 39 55.7138 -31 38 27.630           ~ 2 0
70 [DAZ2013] 78 Cl* 13 39 55.7152 -31 38 31.501           ~ 2 0
71 [DAZ2013] 73 Cl* 13 39 55.7346 -31 38 29.970           ~ 2 0
72 [DAZ2013] 40 Cl* 13 39 55.7410 -31 38 24.595           ~ 2 0
73 [DAZ2013] 120 Cl* 13 39 55.7590 -31 38 37.744           ~ 1 0
74 [DAZ2013] 164 Cl* 13 39 55.7593632984 -31 38 43.539288504           ~ 2 0
75 [HCG2004] NGC 5253 C 31 Cl* 13 39 55.7623 -31 38 16.258           ~ 2 0
76 [DAZ2013] 15 Cl* 13 39 55.7642 -31 38 16.703           ~ 1 0
77 [DAZ2013] 81 Cl* 13 39 55.7649 -31 38 30.609           ~ 1 0
78 [DAZ2013] 80 Cl* 13 39 55.7672 -31 38 30.329           ~ 1 0
79 [DAZ2013] 130 Cl* 13 39 55.7728 -31 38 38.456           ~ 2 0
80 [DAZ2013] 146 Cl* 13 39 55.7825 -31 38 40.365           ~ 2 0
81 [DAZ2013] 93 Cl* 13 39 55.7861 -31 38 31.975           ~ 1 0
82 [DAZ2013] 10 Cl* 13 39 55.7963 -31 38 15.189           ~ 1 0
83 [DAZ2013] 143 Cl* 13 39 55.7979 -31 38 39.633           ~ 2 0
84 [DAZ2013] 88 Cl* 13 39 55.8009 -31 38 31.152           ~ 1 0
85 [DAZ2013] 43 Cl* 13 39 55.8052 -31 38 23.590           ~ 2 0
86 [DAZ2013] 109 Cl* 13 39 55.8149 -31 38 33.910           ~ 1 0
87 [DAZ2013] 113 Cl* 13 39 55.8254 -31 38 34.470           ~ 1 0
88 [DAZ2013] 136 Cl* 13 39 55.8295 -31 38 37.693           ~ 1 0
89 [DAZ2013] 124 Cl* 13 39 55.8360 -31 38 35.866           ~ 2 0
90 [DAZ2013] 140 Cl* 13 39 55.8440 -31 38 37.900           ~ 2 0
91 [DAZ2013] 112 Cl* 13 39 55.8457 -31 38 33.830           ~ 2 0
92 [DAZ2013] 72 Cl* 13 39 55.8480 -31 38 26.716           ~ 1 0
93 [DAZ2013] 13 Cl* 13 39 55.8481 -31 38 14.246           ~ 1 0
94 [DAZ2013] 69 Cl* 13 39 55.8530 -31 38 26.415           ~ 1 0
95 [DAZ2013] 147 Cl* 13 39 55.8539 -31 38 38.399           ~ 1 0
96 [DAZ2013] 21 Cl* 13 39 55.8646 -31 38 15.500           ~ 2 0
97 [DAZ2013] 75 Cl* 13 39 55.8697 -31 38 26.622           ~ 1 0
98 [DAZ2013] 118 Cl* 13 39 55.8746 -31 38 34.048           ~ 2 0
99 [DAZ2013] 153 Cl* 13 39 55.8903 -31 38 38.342           ~ 1 0
100 [DAZ2013] 154 Cl* 13 39 55.8909 -31 38 38.379           ~ 1 0
101 [DAZ2013] 77 Cl* 13 39 55.9017 -31 38 26.276           ~ 1 0
102 [DAZ2013] 148 Cl* 13 39 55.9039 -31 38 37.029           ~ 1 0
103 [DAZ2013] 116 Cl* 13 39 55.9059 -31 38 33.031           ~ 1 0
104 [DAZ2013] 117 Cl* 13 39 55.9109 -31 38 32.999           ~ 1 0
105 [DAZ2013] 100 Cl* 13 39 55.9112 -31 38 29.098           ~ 2 0
106 [HCG2004] NGC 5253 C 27 Cl* 13 39 55.9147 -31 38 38.455           ~ 6 0
107 [DAZ2013] 96 Cl* 13 39 55.9157 -31 38 28.726           ~ 2 0
108 [DAZ2013] 84 Cl* 13 39 55.9194 -31 38 27.183           ~ 1 0
109 [DAZ2013] 123 Cl* 13 39 55.9257 -31 38 33.364           ~ 2 0
110 [DAZ2013] 22 Cl* 13 39 55.9342 -31 38 14.271           ~ 2 0
111 [DAZ2013] 86 Cl* 13 39 55.9414 -31 38 26.758           ~ 2 0
112 [DAZ2013] 138 Cl* 13 39 55.9455 -31 38 34.661           ~ 2 0
113 [DAZ2013] 51 Cl* 13 39 55.9481 -31 38 20.770           ~ 2 0
114 [DAZ2013] 85 Cl* 13 39 55.9502 -31 38 26.366           ~ 1 0
115 [DAZ2013] 162 Cl* 13 39 55.9542 -31 38 39.164           ~ 2 0
116 [DAZ2013] 90 Cl* 13 39 55.9558 -31 38 27.053           ~ 2 0
117 [DAZ2013] 92 Cl* 13 39 55.9619 -31 38 27.030           ~ 1 0
118 [DAZ2013] 155 Cl* 13 39 55.9624 -31 38 36.925           ~ 2 0
119 [DAZ2013] 66 Cl* 13 39 55.9673 -31 38 22.589           ~ 2 0
120 [DAZ2013] 170 Cl* 13 39 55.9694 -31 38 40.547           ~ 2 0
121 [DAZ2013] 101 Cl* 13 39 55.9716 -31 38 27.628           ~ 1 0
122 [DAZ2013] 94 Cl* 13 39 55.9739 -31 38 26.919           ~ 1 0
123 [DAZ2013] 61 Cl* 13 39 55.9767 -31 38 21.495           ~ 1 0
124 [DAZ2013] 129 Cl* 13 39 55.98 -31 38 31.9           ~ 23 0
125 [DAZ2013] 157 Cl* 13 39 55.9869 -31 38 36.653           ~ 1 0
126 NGC 5253 rG 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33 13.47 ~ 1421 4
127 [DAZ2013] 114 Cl* 13 39 55.9911 -31 38 30.327           ~ 2 0
128 [DAZ2013] 60 Cl* 13 39 55.9924 -31 38 20.779           ~ 2 0
129 [DAZ2013] 163 Cl* 13 39 55.9927 -31 38 38.111           ~ 2 0
130 [DAZ2013] 32 Cl* 13 39 55.9950 -31 38 16.729           ~ 1 0
131 [DAZ2013] 161 Cl* 13 39 55.9951 -31 38 37.904           ~ 1 0
132 [DAZ2013] 149 Cl* 13 39 55.9963 -31 38 34.488           ~ 2 0
133 [DAZ2013] 159 Cl* 13 39 55.9966 -31 38 37.562           ~ 1 0
134 [DAZ2013] 128 Cl* 13 39 55.9971 -31 38 32.022           ~ 1 0
135 [DAZ2013] 169 Cl* 13 39 56.0050 -31 38 39.491           ~ 1 0
136 NAME NGC 5353 Radio Supernebula Cl* 13 39 56.007 -31 38 25.00           ~ 51 0
137 [DAZ2013] 50 Cl* 13 39 56.0092 -31 38 19.069           ~ 2 0
138 [HCG2004] NGC 5253 C 8 Cl* 13 39 56.0169 -31 38 27.422           ~ 6 0
139 [DAZ2013] 125 Cl* 13 39 56.0172 -31 38 31.178           ~ 2 0
140 NGC 5253C H2G 13 39 56.020 -31 38 27.89           ~ 33 0
141 [DAZ2013] 127 Cl* 13 39 56.0200 -31 38 31.361           ~ 2 0
142 [DAZ2013] 99 Cl* 13 39 56.0229 -31 38 25.962           ~ 2 0
143 [DAZ2013] 39 Cl* 13 39 56.0387 -31 38 16.369           ~ 2 0
144 [DAZ2013] 141 Cl* 13 39 56.0394 -31 38 32.673           ~ 2 0
145 [DAZ2013] 171 Cl* 13 39 56.0396 -31 38 38.838           ~ 1 0
146 [DAZ2013] 82 Cl* 13 39 56.0431 -31 38 23.632           ~ 2 0
147 [DAZ2013] 108 Cl* 13 39 56.0508 -31 38 27.096           ~ 1 0
148 [DAZ2013] 174 Cl* 13 39 56.0567 -31 38 40.704           ~ 2 0
149 [DAZ2013] 122 Cl* 13 39 56.0652 -31 38 29.481           ~ 2 0
150 [DAZ2013] 74 Cl* 13 39 56.0656 -31 38 20.899           ~ 2 0
151 [DAZ2013] 150 Cl* 13 39 56.0671 -31 38 32.572           ~ 2 0
152 [DAZ2013] 167 Cl* 13 39 56.0730 -31 38 37.541           ~ 1 0
153 [DAZ2013] 178 Cl* 13 39 56.0801599680 -31 38 44.048950080           ~ 2 0
154 [DAZ2013] 103 Cl* 13 39 56.0819 -31 38 25.349           ~ 2 0
155 [DAZ2013] 97 Cl* 13 39 56.0859 -31 38 24.109           ~ 2 0
156 [DAZ2013] 160 Cl* 13 39 56.0861 -31 38 35.163           ~ 2 0
157 [DAZ2013] 44 Cl* 13 39 56.0961 -31 38 15.638           ~ 2 0
158 [DAZ2013] 176 Cl* 13 39 56.1099 -31 38 40.516           ~ 1 0
159 [DAZ2013] 145 Cl* 13 39 56.1121 -31 38 31.212           ~ 1 0
160 [DAZ2013] 76 Cl* 13 39 56.1228 -31 38 19.805           ~ 1 0
161 [DAZ2013] 105 Cl* 13 39 56.1723 -31 38 23.075           ~ 4 0
162 [DAZ2013] 135 Cl* 13 39 56.1726 -31 38 28.258           ~ 2 0
163 [DAZ2013] 179 Cl* 13 39 56.1759 -31 38 43.423           ~ 2 0
164 [DAZ2013] 104 Cl* 13 39 56.1895 -31 38 22.460           ~ 2 0
165 [DAZ2013] 110 Cl* 13 39 56.2225 -31 38 22.880           ~ 2 0
166 [DAZ2013] 139 Cl* 13 39 56.2385 -31 38 27.059           ~ 2 0
167 [DAZ2013] 134 Cl* 13 39 56.2396 -31 38 26.239           ~ 1 0
168 [DAZ2013] 131 Cl* 13 39 56.2404 -31 38 25.981           ~ 2 0
169 [DAZ2013] 151 Cl* 13 39 56.2710 -31 38 27.793           ~ 1 0
170 [DAZ2013] 144 Cl* 13 39 56.2764 -31 38 26.536           ~ 2 0
171 [DAZ2013] 172 Cl* 13 39 56.2781041320 -31 38 33.440996004           ~ 1 0
172 [DAZ2013] 121 Cl* 13 39 56.2834 -31 38 23.465           ~ 2 0
173 [DAZ2013] 132 Cl* 13 39 56.2911 -31 38 24.672           ~ 2 0
174 [DAZ2013] 142 Cl* 13 39 56.3001 -31 38 25.634           ~ 1 0
175 [DAZ2013] 115 Cl* 13 39 56.3852 -31 38 19.519           ~ 2 0
176 [DAZ2013] 126 Cl* 13 39 56.3997 -31 38 20.729           ~ 2 0
177 [DAZ2013] 173 Cl* 13 39 56.4222139968 -31 38 27.521416248           ~ 2 0
178 [DAZ2013] 133 Cl* 13 39 56.4372 -31 38 20.768           ~ 1 0
179 [DAZ2013] 137 Cl* 13 39 56.5285 -31 38 18.609           ~ 1 0
180 [DAZ2013] 175 Cl* 13 39 56.5771 -31 38 26.979           ~ 2 0
181 [DAZ2013] 158 Cl* 13 39 56.5815 -31 38 21.369           ~ 2 0
182 [DAZ2013] 152 Cl* 13 39 56.5891 -31 38 19.099           ~ 1 0
183 [DAZ2013] 168 Cl* 13 39 56.5895 -31 38 23.447           ~ 2 0
184 [DAZ2013] 165 Cl* 13 39 56.6007 -31 38 22.288           ~ 1 0
185 [DAZ2013] 166 Cl* 13 39 56.6570 -31 38 21.306           ~ 2 0
186 [DAZ2013] 177 Cl* 13 39 56.7071 -31 38 28.272           ~ 2 0
187 [DAZ2013] 180 Cl* 13 39 56.8359849720 -31 38 24.895490856           ~ 2 0
188 [DAZ2013] 181 Cl* 13 39 56.9418 -31 38 25.537           ~ 2 0

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