2009ApJ...705.1533C

Query : 2009ApJ...705.1533C

2009ApJ...705.1533C - Astrophys. J., 705, 1533-1547 (2009/November-2)

Study of NGC 5128 globular clusters under multivariate statistical paradigm.

CHATTOPADHYAY A.K., CHATTOPADHYAY T., DAVOUST E., MONDAL S. and SHARINA M.

Abstract (from CDS):

An objective classification of the globular clusters (GCs) of NGC 5128 has been carried out by using a model-based approach of cluster analysis. The set of observable parameters includes structural parameters, spectroscopically determined Lick indices and radial velocities from the literature. The optimum set of parameters for this type of analysis is selected through a modified technique of principal component analysis, which differs from the classical one in the sense that it takes into consideration the effects of outliers present in the data. Then a mixture model based approach has been used to classify the GCs into groups. The efficiency of the techniques used is tested through the comparison of the misclassification probabilities with those obtained using the K-means clustering technique. On the basis of the above classification scheme three coherent groups of GCs have been found. We propose that the clusters of one group originated in the original cluster formation event that coincided with the formation of the elliptical galaxy, and that the clusters of the two other groups are of external origin, from tidally stripped dwarf galaxies on random orbits around NGC 5128 for one group, and from an accreted spiral galaxy for the other.

Abstract Copyright: ∼

Journal keyword(s): galaxies: general - globular clusters: general - methods: statistical

VizieR on-line data: <Available at CDS (J/ApJ/705/1533): table1.dat table2.dat>

Simbad objects: 141

goto Full paper

goto View the references in ADS

Number of rows : 141
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 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
4 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
5 NGC 4038 EmG 12 01 53.002 -18 52 03.32   10.91   9.74 11.0 ~ 1364 1
6 M 49 Sy2 12 29 46.8 +08 00 01   13.21 12.17     ~ 2174 2
7 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
8 ACO 3526 ClG 12 48 49.2 -41 18 17           ~ 1154 2
9 [HSS2021] 213445 GlC 13 24 26.97 -43 17 20.0           ~ 6 0
10 [VHH81] 112 GlC 13 24 32.66 -43 18 48.8           ~ 6 0
11 [HSS2021] 217309 GlC 13 24 36.8547040344 -43 19 16.278316176 20.01 19.82 19.03 18.53 18.00 ~ 14 0
12 [HSS2021] 217604 GlC 13 24 37.75 -43 16 26.5           ~ 7 0
13 [VHH81] 29 GlC 13 24 40.3771770240 -43 18 05.308939512 19.77 19.15 18.15 17.54 16.89 ~ 36 0
14 [HSS2021] 218609 GlC 13 24 40.47 -42 53 35.1           ~ 8 0
15 [HSS2021] 219834 GlC 13 24 43.5822100416 -42 53 07.232106876 21.38 20.87 19.85 19.26 18.58 ~ 12 0
16 [HGH2004] 201.20297-42.87653 GlC 13 24 48.7083803784 -42 52 35.529153456           ~ 11 0
17 [PFF2004] gc 21 GlC 13 24 54.1554535584 -42 54 50.463095220 20.21 20.03 19.25 18.75 18.24 ~ 13 0
18 [HSS2021] 223957 GlC 13 24 54.3453849720 -42 53 24.723137364 18.76 18.24 17.25 16.67 16.02 ~ 18 0
19 [HSS2021] 224029 GlC 13 24 54.5431957152 -42 48 58.568046084 20.55 20.30 19.44 18.90 18.37 ~ 14 0
20 [VHH81] 116 GlC 13 24 55.44 -43 09 58.3           ~ 7 0
21 [VHH81] 117 GlC 13 24 56.0568324120 -42 54 29.612722896       19.26   ~ 9 0
22 [WHB2007] GC0083 GlC 13 24 56.0598140400 -43 10 16.366583100 21.34 21.03 20.45 20.05 19.62 ~ 11 0
23 [VHH81] 118 GlC 13 24 57.16 -43 08 42.6           ~ 8 0
24 [HGH2004] 201.24037-42.93011 GlC 13 24 57.68 -42 55 48.4           ~ 9 0
25 [HSS2021] 225302 GlC 13 24 57.94 -42 52 04.9           ~ 7 0
26 [HGH2004] 201.24254-42.93612 GlC 13 24 58.1998428312 -42 56 10.050292680 19.34 18.73 17.71 17.10 16.44 ~ 33 0
27 [VHH81] 121 GlC 13 24 58.42 -43 08 21.2           ~ 6 0
28 [VHH81] 122 Gl? 13 24 59.01 -43 08 21.4           ~ 5 0
29 [VHH81] 123 GlC 13 24 59.919 -43 09 08.60       20.24   ~ 9 0
30 [HSS2021] 226182 GlC 13 25 00.37 -43 10 46.9           ~ 6 0
31 [HSS2021] 226340 GlC 13 25 00.83 -43 11 10.6           ~ 7 0
32 [VHH81] 126 GlC 13 25 00.91 -43 09 14.5           ~ 6 0
33 [VHH81] 127 GlC 13 25 01.32 -43 08 43.4           ~ 6 0
34 [VHH81] 128 GlC 13 25 01.46 -43 08 32.9           ~ 7 0
35 [WHB2007] GC0103 GlC 13 25 01.5825588264 -42 54 40.818648816 19.97 19.75 19.37 19.06 18.71 ~ 16 1
36 [HSS2021] 226626 GlC 13 25 01.62 -42 50 51.1           ~ 7 0
37 [VHH81] 4 GlC 13 25 01.8018131256 -43 09 25.486559676 19.10 18.86 18.04 17.50 16.98 ~ 19 0
38 [HSS2021] 226711 GlC 13 25 01.8492967824 -42 52 27.805968012       19.85   ~ 9 0
39 [HSS2021] 227051 GlC 13 25 02.7371510064 -43 11 21.385960512 20.51 20.29 19.48 18.99 18.42 ~ 14 0
40 [HSS2021] 227290 GlC 13 25 03.3560325552 -42 50 46.068274356 20.22 19.50 18.44 17.81 17.15 ~ 14 0
41 [HSS2021] 227289 GlC 13 25 03.37 -43 11 39.6 20.98 20.70 19.91 19.35 18.84 ~ 9 0
42 [HSS2021] 227405 GlC 13 25 03.673 -42 51 21.74       20.20   ~ 9 0
43 [PFF2004] gc 35 GlC 13 25 04.4480968776 -43 10 48.554937156 21.32 20.73 19.71 19.07 18.44 ~ 12 0
44 [VHH81] 43 GlC 13 25 04.7818464048 -43 09 38.897564328 19.74 19.45 18.60 18.07 17.53 ~ 14 0
45 [VHH81] 12 GlC 13 25 05.6851767120 -43 10 30.872058411   18.82 17.74 17.74   ~ 25 0
46 [HHG2004] 47 GlC 13 25 08.5064319792 -43 02 57.523546284 20.59 19.95 18.91 18.37 17.64 ~ 12 0
47 [R2001b] f2.GC-71 GlC 13 25 08.7838496040 -43 09 09.634274820 20.49 20.23 19.42 18.91 18.39 ~ 10 0
48 [R2001b] f2.GC-70 GlC 13 25 08.92 -43 08 53.5     20.30     ~ 11 0
49 [R2001b] f2.GC-69 GlC 13 25 09.0585745752 -43 10 01.981680168     19.87     ~ 9 0
50 [HGH2004] 201.29370-42.74801 GlC 13 25 10.4802150120 -42 44 52.715652360 19.23 18.84 17.94 17.40 16.79 ~ 14 0
51 [BBP2008] AAT113992 GlC 13 25 10.4829088656 -43 03 24.079051656 21.95 21.39 20.40 19.79 19.19 ~ 9 0
52 [VHH81] 133 Gl? 13 25 11.0527566096 -43 01 31.994667156           ~ 7 0
53 [HGH2004] 201.29642-43.05266 GlC 13 25 11.1423004224 -43 03 09.639856008 20.57 20.32 19.51 18.99 18.48 ~ 17 0
54 [VHH81] 134 GlC 13 25 13.20 -43 02 31.2           ~ 8 0
55 [VHH81] 136 GlC 13 25 14.07 -43 03 35.0           ~ 6 0
56 [VHH81] 135 Gl? 13 25 14.07 -43 00 51.8           ~ 6 0
57 [VHH81] 137 Gl? 13 25 16.06 -43 02 19.3           ~ 6 0
58 [VHH81] 138 GlC 13 25 16.9108122264 -43 03 08.046229932           ~ 7 0
59 [VHH81] 139 GlC 13 25 17.0576091024 -43 02 44.733930468       18.86   ~ 8 0
60 [VHH81] 140 GlC 13 25 17.42 -43 03 25.2           ~ 6 0
61 [VHH81] 141 GlC 13 25 18.14 -43 02 50.9           ~ 7 0
62 [BBP2008] AAT115339 GlC 13 25 18.4204808472 -43 04 09.898860684 21.19 20.91 20.11 19.53 19.01 ~ 10 0
63 2MASS J13251850-4301162 GlC 13 25 18.5019321888 -43 01 16.076648028   19.47 18.20     ~ 11 0
64 [VHH81] 6 GlC 13 25 22.19 -43 02 45.6 18.65 18.17 17.21 16.61 16.03 ~ 27 0
65 [VHH81] 143 GlC 13 25 23.20 -43 03 12.9           ~ 7 0
66 [HHG2004] 108 GlC 13 25 25.7274117864 -43 05 16.616129424 20.88 20.70 19.88 19.39 18.86 ~ 14 0
67 [VHH81] 144 GlC 13 25 26.28 -43 04 38.5           ~ 7 0
68 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
69 [KKF2001] J132528.04-430402.81 GlC 13 25 27.9708458640 -43 04 02.237343060 20.90 20.23 19.18 18.56 17.90 ~ 17 0
70 [VHH81] 145 * 13 25 28.8063628056 -43 04 21.674455284           ~ 8 0
71 [R2001b] f2.GC-31 GlC 13 25 29.38 -43 07 41.1     20.66     ~ 7 0
72 JCMTSE J132530.0-430511 GlC 13 25 29.8686752616 -43 05 09.254460084       19.94   ~ 12 0
73 [R2001b] f2.GC-28 GlC 13 25 30.16 -43 06 54.7     21.49     ~ 9 0
74 [VHH81] 147 GlC 13 25 30.648 -43 03 47.12       20.05   ~ 8 0
75 [BBP2008] AAT117287 GlC 13 25 31.06 -43 04 16.9 22.20 21.44 20.36 19.82 19.13 ~ 8 0
76 [HGH2004] 201.38229-43.09610 GlC 13 25 31.751 -43 05 45.96       20.21   ~ 11 0
77 [VHH81] 149 GlC 13 25 32.3228282664 -43 07 17.128677216 21.07 20.90 20.15 19.64 19.19 ~ 11 0
78 [R2001b] f2.GC-23 GlC 13 25 32.7853774512 -43 07 02.294656032 20.08 19.67 18.77 18.23 17.64 ~ 23 0
79 [HGH2004] 201.38693-43.07476 GlC 13 25 32.88 -43 04 29.2 21.23 20.44 19.37 18.77 18.12 ~ 14 0
80 [R2001b] f2.GC-20 GlC 13 25 33.14 -43 07 01.2     21.26     ~ 8 0
81 [R2001b] f2.GC-18 GlC 13 25 33.58 -43 07 18.5     21.44     ~ 6 0
82 [VHH81] 150 Gl? 13 25 33.8076711360 -43 02 49.527973572           ~ 7 0
83 [VHH81] 151 GlC 13 25 33.9262226376 -43 03 51.450525792       19.95   ~ 9 0
84 [VHH81] 152 * 13 25 34.6304493617 -43 03 16.328036565           ~ 6 0
85 [VHH81] 153 GlC 13 25 34.650 -43 03 27.70     20.0 18.41   ~ 25 0
86 [VHH81] 154 Gl? 13 25 34.71 -43 03 30.2           ~ 6 0
87 [HHG2004] 35 GlC 13 25 35.31 -43 05 29.0     18.63     ~ 10 0
88 [R2001b] f2.GC-14 GlC 13 25 35.82 -43 07 15.3     22.08     ~ 7 0
89 [R2001b] f2.GC-12 GlC 13 25 36.48 -43 08 04.0     21.47     ~ 8 0
90 [BBP2008] AAT118198 GlC 13 25 37.4515217880 -43 05 44.994607044 21.49 20.68 19.64 18.98 18.29 ~ 9 0
91 [VHH81] 156 * 13 25 38.4272079840 -43 05 02.636539476           ~ 8 0
92 [VHH81] 157 GlC 13 25 38.4400649160 -43 03 28.830967668           ~ 9 0
93 [VHH81] 158 GlC 13 25 38.763 -43 05 34.51       20.06   ~ 8 0
94 [VHH81] 159 GlC 13 25 39.1747694136 -43 04 33.842168976       19.93   ~ 9 0
95 [PFF2004] gc 59 GlC 13 25 39.6329735112 -43 04 01.444859580 21.53 20.97 19.96 19.35 18.73 ~ 10 0
96 [CFW90] Star 33 GlC 13 25 39.88 -43 05 01.9 18.79 18.42 17.53 16.97 16.43 ~ 24 0
97 [VHH81] 160 Gl? 13 25 40.0771114323 -43 03 07.009845150           ~ 7 0
98 [R2001b] f2.GC-4 GlC 13 25 40.521 -43 07 17.87 21.58 20.84 19.80 19.16 18.41 ~ 10 0
99 [HGH2004] 201.42027-43.08345 GlC 13 25 40.85 -43 05 00.2           ~ 10 0
100 [R2001b] f2.GC-3 GlC 13 25 40.8914082360 -43 08 16.059548796 20.66 20.56 19.84 19.36 18.88 ~ 12 0
101 [VHH81] 163 GlC 13 25 41.631 -43 03 45.79       20.43   ~ 9 0
102 [VHH81] 164 Gl? 13 25 42.0750913320 -43 03 19.461390876           ~ 7 0
103 [BBP2008] AAT119508 GlC 13 25 42.5086836792 -43 03 41.504261328 21.85 21.42 20.39 19.77 19.18 ~ 11 0
104 [VHH81] 19 GlC 13 25 43.3840630536 -43 07 22.928276928 19.37 19.01 18.12 17.59 17.03 ~ 17 0
105 [VHH81] 165 GlC 13 25 43.4346420432 -43 04 56.475863652           ~ 8 0
106 [PFF2004] gc 63 GlC 13 25 43.7849456448 -43 07 55.006984812 20.66 20.55 19.83 19.37 18.89 ~ 10 0
107 [VHH81] 166 Gl? 13 25 44.90 -43 04 21.1           ~ 5 0
108 [VHH81] 167 Gl? 13 25 45.96 -43 06 45.4           ~ 6 0
109 [HGH92] G284 GlC 13 25 46.59 -42 57 03.0 21.47 20.89 19.87 19.28 18.63 ~ 17 0
110 [PFF2004] gc 66 GlC 13 25 47.1280788384 -43 06 08.914611240 21.21 20.82 19.92 19.37 18.80 ~ 12 0
111 [VHH81] 168 GlC 13 25 48.46 -43 07 12.5           ~ 6 0
112 [BBP2008] AAT120336 GlC 13 25 50.1992619336 -43 06 08.594635140 21.66 21.14 20.17 19.57 18.96 ~ 8 0
113 [HGH2004] 201.46256-42.92675 GlC 13 25 51.013 -42 55 36.30       20.39   ~ 11 0
114 [BBP2008] AAT120976 GlC 13 25 54.2747706984 -42 56 20.493407976 21.51 21.23 20.38 19.84 19.27 ~ 11 0
115 [VHH81] 170 GlC 13 25 56.10 -42 56 13.1           ~ 7 0
116 [HGH2004] 201.49075-42.92669 GlC 13 25 57.78 -42 55 36.1           ~ 8 0
117 [HSS2021] 247752 GlC 13 25 57.95 -42 53 04.3           ~ 6 0
118 [HSS2021] 248114 GlC 13 25 58.8892732824 -42 53 18.852864144 20.74 20.43 19.58 19.06 18.52 ~ 13 0
119 [BBP2008] AAT121826 GlC 13 25 59.4651410664 -42 55 30.766097136 20.91 20.65 19.81 19.28 18.73 ~ 10 0
120 [VHH81] 173 GlC 13 25 59.57 -42 55 01.5           ~ 6 0
121 [VHH81] 174 GlC 13 25 59.63 -42 55 15.7           ~ 6 0
122 [VHH81] 175 GlC 13 26 00.93 -42 58 28.9           ~ 8 0
123 [HGH92] G221 GlC 13 26 01.10 -42 55 13.4 20.87 20.24 19.30 18.75 18.13 ~ 11 0
124 [HGH2004] 201.50755-42.97082 GlC 13 26 01.8129561264 -42 58 14.960418924 21.23 20.80 19.86 19.30 18.72 ~ 12 0
125 [VHH81] 176 GlC 13 26 02.79 -42 57 05.0           ~ 7 0
126 [VHH81] 25 GlC 13 26 02.8277560464 -42 56 57.008606640 20.17 19.56 18.49 17.85 17.17 ~ 16 0
127 [VHH81] 178 GlC 13 26 03.85 -42 56 45.3           ~ 6 0
128 [HGH92] G293 GlC 13 26 04.1792886816 -42 55 44.696977572 20.11 19.90 19.04 18.61 18.22 ~ 14 0
129 [VHH81] 105 GlC 13 26 05.04 -42 55 36.5     22.01     ~ 9 0
130 [VHH81] 7 GlC 13 26 05.3936216880 -42 56 32.376406056 18.38 18.03 17.17 16.65 16.23 ~ 42 0
131 [R2001b] f1.GC-20 GlC 13 26 05.45 -42 55 22.4     21.51     ~ 9 0
132 [HGH92] G170 GlC 13 26 06.93 -42 57 35.1 20.78 20.21 19.22 18.65 17.97 ~ 12 0
133 [VHH81] 36 GlC 13 26 07.7152331040 -42 52 00.209032536 19.42 19.19 18.35 17.81 17.33 ~ 29 0
134 [BBP2008] AAT123412 G 13 26 08.96 -42 53 42.4     19.44     ~ 8 0
135 [HSS2021] 252283 GlC 13 26 09.3599847264 -42 53 17.528866764     19.93     ~ 9 0
136 [HSS2021] 252403 GlC 13 26 09.67 -42 53 16.9     21.27     ~ 8 0
137 [VHH81] 179 GlC 13 26 09.92 -42 56 36.4           ~ 7 0
138 [VHH81] 37 GlC 13 26 10.5651604212 -42 53 42.638068584 19.86 19.38 18.43 17.87 17.26 ~ 35 0
139 [HSS2021] 252710 GlC 13 26 10.60 -42 55 00.0     21.65     ~ 7 0
140 LEDA 166179 G 13 48 46.4 -46 59 46           ~ 36 1
141 NGC 7252 AGN 22 20 44.7748209648 -24 40 41.909518200 12.26 12.46 12.06 11.57   ~ 720 1

To bookmark this query, right click on this link: simbad:objects in 2009ApJ...705.1533C and select 'bookmark this link' or equivalent in the popup menu