2006A&A...450..105B


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.25CEST01:52:00

2006A&A...450..105B - Astronomy and Astrophysics, volume 450, 105-115 (2006/4-4)

Globular cluster system and Milky Way properties revisited.

BICA E., BONATTO C., BARBUY B. and ORTOLANI S.

Abstract (from CDS):

Updated data of the 153 Galactic globular clusters are used to readdress fundamental parameters of the Milky Way, such as the distance of the Sun to the Galactic centre, the bulge and halo structural parameters, and cluster destruction rates. We build a reduced sample that has been decontaminated of all the clusters younger than 10Gyr and of those with retrograde orbits and/or evidence of relation to dwarf galaxies. The reduced sample contains 116 globular clusters that are tested for whether they were formed in the primordial collapse. The 33 metal-rich globular clusters ([Fe/H]≥-0.75) of the reduced sample basically extend to the Solar circle and are distributed over a region with the projected axial-ratios typical of an oblate spheroidal, Δx:Δy:Δz≃1.0:0.9:0.4. Those outside this region appear to be related to accretion. The 81 metal-poor globular clusters span a nearly spherical region of axial-ratios ≃1.0:1.0:0.8 extending from the central parts to the outer halo, although several clusters in the external region still require detailed studies to unravel their origin as accretion or collapse. A new estimate of the Sun's distance to the Galactic centre, based on the symmetries of the spatial distribution of 116 globular clusters, is provided with a considerably smaller uncertainty than in previous determinations using globular clusters, RO=7.2±0.3kpc. The metal-rich and metal-poor radial-density distributions flatten for RGC≤2kpc and are represented well over the full Galactocentric distance range both by a power-law with a core-like term and Sersic's law; at large distances they fall off as ∼R–3.9. Both metallicity components appear to have a common origin that is different from that of the dark matter halo. Structural similarities between the metal-rich and metal-poor radial distributions and the stellar halo are consistent with a scenario where part of the reduced sample was formed in the primordial collapse and part was accreted in an early period of merging. This applies to the bulge as well, suggesting an early merger affecting the central parts of the Galaxy. The present decontamination procedure is not sensitive to all accretions (especially prograde) during the first Gyr, since the observed radial density profiles still preserve traces of the earliest merger(s). We estimate that the present globular cluster population corresponds to ≤23±6% of the original one. The fact that the volume-density radial distributions of the metal-rich and metal-poor globular clusters of the reduced sample follow both a core-like power-law, and Sersic's law indicates that we are dealing with spheroidal subsystems at all scales.

Abstract Copyright:

Journal keyword(s): Galaxy: globular clusters: general - Galaxy: structure

VizieR on-line data: <Available at CDS (J/A+A/450/105): table1.dat>

CDS comments: GLIMPSE-C01 not identified

Simbad objects: 161

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Number of rows : 161

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3650 0
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9846 1
3 NGC 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 955 0
4 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 977 0
5 NAME Whiting 1 GlC 02 02 56.8 -03 15 10           ~ 116 0
6 NAME Fornax Dwarf Spheroidal G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1547 1
7 NGC 1261 GlC 03 12 16.21 -55 12 58.4     8.63     ~ 448 0
8 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3652 3
9 Cl Pal 1 GlC 03 33 20.04 +79 34 51.8   17.2       ~ 210 1
10 NAME E 1 GlC 03 55 02.5 -49 36 52           ~ 185 0
11 NAME CL ERID 1 GlC 04 24 44.5 -21 11 13           ~ 162 1
12 Cl Pal 2 GlC 04 46 05.91 +31 22 53.4   15       ~ 151 0
13 NGC 1851 GlC 05 14 06.76 -40 02 47.6   8.80 7.23     ~ 1283 0
14 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15440 1
15 M 79 GlC 05 24 10.59 -24 31 27.3   9.21 8.16     ~ 742 0
16 NGC 2298 GlC 06 48 59.41 -36 00 19.1   10.77 8.89     ~ 446 0
17 NGC 2419 GlC 07 38 08.51 +38 52 54.9     10.05     ~ 851 0
18 NAME PYX GLOBULAR CL GlC 09 07 57.80 -37 13 17.0           ~ 86 0
19 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1295 0
20 NAME E 3 GlC 09 20 57.07 -77 16 54.8           ~ 139 0
21 NAME Sextans C GlC 10 05 30.96 +00 04 15.4   15.5 13.9     ~ 299 1
22 NGC 3201 GlC 10 17 36.82 -46 24 44.9           ~ 763 0
23 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 270 0
24 GCl 17 GlC 11 29 16.80 +28 58 25.0   14.4       ~ 325 1
25 NGC 4147 GlC 12 10 06.149 +18 32 31.78   11.45 10.74     ~ 516 0
26 NGC 4372 GlC 12 25 45.43 -72 39 32.7   10.86 9.85     ~ 275 0
27 C 1235-509 GlC 12 38 40.20 -51 09 01.0           ~ 334 0
28 M 68 GlC 12 39 27.98 -26 44 38.6   10.26 7.96     ~ 910 0
29 ClG J1252-2927 ClG 12 52 54.4 -29 27 17           ~ 151 0
30 NGC 4833 GlC 12 59 33.92 -70 52 35.4   8.72 7.79     ~ 372 0
31 M 53 GlC 13 12 55.25 +18 10 05.4   8.95 7.79     ~ 748 0
32 NGC 5053 GlC 13 16 27.09 +17 42 00.9     9.96     ~ 557 0
33 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 3117 0
34 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2323 0
35 NGC 5286 GlC 13 46 26.81 -51 22 27.3   9.18 8.31     ~ 389 0
36 C 1353-269 GlC 13 56 21.702 -27 10 03.00           ~ 109 0
37 NGC 5466 GlC 14 05 27.29 +28 32 04.0   10.5 9.70     ~ 753 0
38 NGC 5634 GlC 14 29 37.28 -05 58 35.1   10.69 10.05     ~ 261 0
39 NGC 5694 GlC 14 39 36.52 -26 32 18.0   11.58 10.89     ~ 276 0
40 IC 4499 GlC 15 00 18.57 -82 12 49.6     8.56     ~ 320 0
41 NGC 5824 GlC 15 03 58.612 -33 04 06.70   10.28 9.56     ~ 360 0
42 NAME Serpens Dwarf GlC 15 16 05.30 -00 06 41.0   15.1       ~ 653 1
43 NGC 5897 GlC 15 17 24.40 -21 00 36.4   10.16 8.52     ~ 352 0
44 M 5 GlC 15 18 33.22 +02 04 51.7   7.34 5.95     ~ 1825 0
45 NGC 5927 GlC 15 28 00.69 -50 40 22.9   10.13 8.86     ~ 421 0
46 NGC 5946 GlC 15 35 28.58 -50 39 35.0   11.98 10.72     ~ 172 0
47 ESO 224-8 OpC 15 39 05.4 -50 03 02           ~ 56 0
48 NGC 5986 GlC 15 46 03.00 -37 47 11.1     6.92     ~ 326 0
49 GCl 38 GlC 16 10 59.00 +14 57 42.0           ~ 336 0
50 Cl Lynga 7 GlC 16 11 03.65 -55 19 04.0           ~ 96 0
51 M 80 GlC 16 17 02.41 -22 58 33.9           ~ 647 0
52 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1721 0
53 NGC 6101 GlC 16 25 48.12 -72 12 07.9   10.90 10.08     ~ 253 0
54 NGC 6144 GlC 16 27 13.86 -26 01 24.6   10.55 9.63     ~ 216 0
55 NGC 6139 GlC 16 27 39.987 -38 50 57.03   11.03 9.68     ~ 186 0
56 ESO 390-6 GlC 16 28 40.10 -35 21 13.0     12.0     ~ 81 0
57 M 107 GlC 16 32 31.86 -13 03 13.6   9.96 8.85     ~ 730 0
58 ESO 452-11 GlC 16 39 25.50 -28 23 52.0           ~ 49 0
59 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2058 0
60 NGC 6229 GlC 16 46 58.641 +47 31 36.38   9.38 9.86     ~ 327 0
61 M 12 GlC 16 47 14.18 -01 56 54.7   8.52 6.07     ~ 603 0
62 NGC 6235 GlC 16 53 25.36 -22 10 38.8   11.99 7.20     ~ 166 0
63 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 719 0
64 NGC 6256 GlC 16 59 32.68 -37 07 17.1           ~ 126 0
65 GCl 50 GlC 16 59 51.1 -00 32 00   15.70       ~ 171 1
66 M 62 GlC 17 01 12.60 -30 06 44.5   8.55 7.39     ~ 538 0
67 M 19 GlC 17 02 37.69 -26 16 04.6   8.45 5.57     ~ 327 1
68 NGC 6284 GlC 17 04 28.747 -24 45 51.22   10.72 7.43     ~ 247 0
69 NGC 6287 GlC 17 05 09.4907827015 -22 42 28.100632364   11.49 10.30     ~ 203 0
70 NGC 6293 GlC 17 10 10.42 -26 34 54.2   9.96 9.02     ~ 251 0
71 NGC 6304 GlC 17 14 32.25 -29 27 43.3   10.33 9.03     ~ 313 0
72 NGC 6316 GlC 17 16 37.42 -28 08 24.0   10.33 9.03     ~ 183 0
73 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 1951 0
74 NGC 6325 GlC 17 17 59.27 -23 45 57.7   11.49       ~ 150 0
75 M 9 GlC 17 19 11.78 -18 30 58.5   9.36 8.42     ~ 287 0
76 NGC 6342 GlC 17 21 10.14 -19 35 14.7   11.25 10.01     ~ 254 0
77 NGC 6356 GlC 17 23 34.99 -17 48 46.9   10.01 7.42     ~ 327 1
78 NGC 6355 GlC 17 23 58.65 -26 21 12.3   12.46 11.05     ~ 132 0
79 NGC 6352 GlC 17 25 29.11 -48 25 19.8   9.95 8.87     ~ 357 0
80 IC 1257 Bz? 17 27 06.00 -07 05 00.0           ~ 64 0
81 ESO 454-29 GlC 17 27 33.24 -30 48 07.8           ~ 216 0
82 NGC 6366 GlC 17 27 44.24 -05 04 47.5           ~ 274 0
83 GCl 66.1 GlC 17 30 38.90 -31 35 44.0           ~ 101 0
84 ESO 455-11 GlC 17 31 05.20 -29 58 54.0           ~ 144 0
85 NGC 6362 GlC 17 31 54.99 -67 02 54.0   9.72 8.86     ~ 509 0
86 C 1730-333 GlC 17 33 24.50 -33 23 20.0           ~ 215 2
87 NGC 6380 GlC 17 34 28.00 -39 04 09.0           ~ 107 0
88 ESO 455-23 GlC 17 35 47.80 -30 28 11.0           ~ 210 0
89 NAME Tonantzintla 2 GlC 17 36 10.500 -38 33 12.00   14.5       ~ 73 0
90 NGC 6388 GlC 17 36 17.461 -44 44 08.34   7.40       ~ 836 1
91 M 14 GlC 17 37 36.15 -03 14 45.3   9.55 5.73     ~ 332 0
92 NGC 6401 GlC 17 38 36.93 -23 54 31.5   11.31 10.71     ~ 140 0
93 NGC 6397 GlC 17 40 42.09 -53 40 27.6   7.39 5.17     ~ 1841 1
94 ESO 520-21 GlC 17 43 42.20 -26 13 21.0           ~ 153 0
95 NGC 6426 GlC 17 44 54.71 +03 10 12.5           ~ 195 0
96 NAME Galactic Center gam 17 45 39.60213 -29 00 22.0000           ~ 12270 0
97 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 3673 3
98 NAME cl Djorgovski 1 GlC 17 47 28.30 -33 03 56.0           ~ 61 0
99 Cl Terzan 5 Cl* 17 48 05.00 -24 46 48.0           ~ 727 1
100 NGC 6440 GlC 17 48 52.67 -20 21 34.5   12.01 10.10     ~ 488 1
101 NGC 6441 GlC 17 50 13.06 -37 03 05.2   9.26 8.00     ~ 797 0
102 ESO 455-49 GlC 17 50 46.40 -31 16 31.0           ~ 162 0
103 NGC 6453 GlC 17 50 51.77 -34 35 55.1   10.49       ~ 140 0
104 NAME UKS 1 GlC 17 54 27.20 -24 08 43.0           ~ 71 0
105 NGC 6496 GlC 17 59 03.68 -44 15 57.4   9.96       ~ 193 0
106 GCl 80.1 GlC 18 01 38.80 -26 50 23.0           ~ 96 0
107 ESO 456-38 GlC 18 01 49.10 -27 49 33.0           ~ 67 0
108 NGC 6517 GlC 18 01 50.376 -08 57 34.39   11.08       ~ 151 0
109 ESO 521-16 GlC 18 02 57.40 -26 04 00.0           ~ 81 0
110 NGC 6522 GlC 18 03 34.08 -30 02 02.3   10.68 9.48     ~ 477 1
111 NGC 6535 GlC 18 03 50.51 -00 17 51.5   11.35 9.85     ~ 258 0
112 NGC 6528 GlC 18 04 49.61 -30 03 20.8   12.12 10.65     ~ 482 0
113 NGC 6539 GlC 18 04 49.74 -07 35 09.1           ~ 202 0
114 NGC 6540 GlC 18 06 08.60 -27 45 55.0           ~ 97 0
115 NGC 6544 GlC 18 07 20.58 -24 59 50.4   11.36 9.90     ~ 250 0
116 NGC 6541 GlC 18 08 02.36 -43 42 53.6   8.06 7.32     ~ 338 1
117 NAME 2MASS-GC01 GlC 18 08 21.8 -19 49 47           ~ 42 0
118 ESO 280-6 GlC 18 09 06.000 -46 25 24.00           ~ 37 0
119 NGC 6553 GlC 18 09 15.68 -25 54 27.9   9.08       ~ 554 0
120 NAME 2MASS-GC02 GlC 18 09 36.5 -20 46 44           ~ 39 0
121 NGC 6558 GlC 18 10 18.38 -31 45 48.6   12.39 11.29     ~ 193 0
122 IC 1276 GlC 18 10 44.26 -07 12 27.3           ~ 105 0
123 ESO 522-1 GlC 18 12 15.80 -22 44 31.0     14.86     ~ 79 1
124 NGC 6569 GlC 18 13 38.88 -31 49 35.2   10.78 9.47     ~ 200 0
125 NGC 6584 GlC 18 18 37.60 -52 12 56.8   10.32 8.17     ~ 257 0
126 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 803 1
127 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 690 0
128 NGC 6638 GlC 18 30 56.25 -25 29 47.1   10.81 9.68     ~ 201 0
129 M 69 GlC 18 31 23.10 -32 20 53.1   9.32 8.31     ~ 423 1
130 NGC 6642 GlC 18 31 54.23 -23 28 34.1   11.30 10.24     ~ 170 0
131 NGC 6652 GlC 18 35 45.63 -32 59 26.6   10.64 9.75     ~ 368 0
132 M 22 GlC 18 36 23.94 -23 54 17.1   7.16 6.17     ~ 1259 0
133 ESO 591-12 GlC 18 41 29.90 -19 49 33.0           ~ 99 0
134 M 70 GlC 18 43 12.76 -32 17 31.6   9.76 9.06     ~ 346 0
135 NGC 6712 GlC 18 53 04.32 -08 42 21.5   9.85 8.69     ~ 480 0
136 NAME SDG G 18 55 03.1 -30 28 42   4.5 3.6     ~ 1854 2
137 M 54 GlC 18 55 03.33 -30 28 47.5           ~ 953 0
138 NGC 6717 GlC 18 55 06.04 -22 42 05.3   11.29 10.35     ~ 208 0
139 NGC 6723 GlC 18 59 33.15 -36 37 56.1           ~ 449 0
140 NGC 6749 GlC 19 05 15.36 +01 54 00.0     12.4     ~ 136 0
141 NGC 6752 GlC 19 10 52.11 -59 59 04.4   6.96 6.28     ~ 1855 0
142 NGC 6760 GlC 19 11 12.06 +01 01 49.7   11.37 9.78     ~ 213 0
143 M 56 GlC 19 16 35.57 +30 11 00.5   8.90       ~ 380 0
144 Cl Terzan 7 GlC 19 17 43.92 -34 39 27.8           ~ 378 0
145 GCl 111 GlC 19 18 02.10 +18 34 18.0           ~ 93 0
146 Cl Arp 2 GlC 19 28 44.11 -30 21 20.3     12.41     ~ 315 0
147 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 784 0
148 Cl Terzan 8 GlC 19 41 44.41 -33 59 58.1     11.54     ~ 274 0
149 GCl 114 GlC 19 45 14.40 -08 00 26.0     7.54     ~ 122 0
150 M 71 GlC 19 53 46.49 +18 46 45.1   7.91 6.1     ~ 1049 0
151 M 75 GlC 20 06 04.841 -21 55 20.14     8.26     ~ 326 0
152 NGC 6934 GlC 20 34 11.37 +07 24 16.1   10.48 9.75     ~ 375 0
153 M 72 GlC 20 53 27.70 -12 32 14.3   9.95 8.96     ~ 381 0
154 NGC 7006 GlC 21 01 29.465 +16 11 16.49     10.46     ~ 494 0
155 M 15 GlC 21 29 58.33 +12 10 01.2   3       ~ 2968 0
156 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 933 1
157 M 30 GlC 21 40 22.12 -23 10 47.5     7.10     ~ 951 0
158 Cl Pal 12 GlC 21 46 38.84 -21 15 09.4     11.89     ~ 467 0
159 GCl 124 GlC 23 06 44.48 +12 46 19.2   15.6       ~ 241 1
160 NGC 7492 GlC 23 08 26.68 -15 36 41.3     10.48     ~ 270 0
161 NAME Galactic Bulge reg ~ ~           ~ 3612 0

    Equat.    Gal    SGal    Ecl

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2021.06.25-01:52:00

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