2005AJ....130..116D

Query : 2005AJ....130..116D

2005AJ....130..116D - Astron. J., 130, 116-125 (2005/July-0)

Galactic globular cluster relative ages.

DE ANGELI F., PIOTTO G., CASSISI S., BUSSO G., RECIO-BLANCO A., SALARIS M., APARICIO A. and ROSENBERG A.

Abstract (from CDS):

We present accurate relative ages for a sample of 55 Galactic globular clusters. The ages have been obtained by measuring the difference between the horizontal branch and the turnoff in two internally photometrically homogeneous databases. The mutual consistency of the two data sets has been assessed by comparing the ages of 16 globular clusters in common between the two databases. We have also investigated the consistency of our relative age determination within the recent stellar model framework. All clusters with [Fe/H]←1.7 are found to be old and coeval, with the possible exception of two objects, which are marginally younger. The age dispersion for the metal-poor clusters is 0.6 Gyr (rms), consistent with a null age dispersion. Intermediate-metallicity clusters (-1.7<[Fe/H]←0.8) are on average 1.5 Gyr younger than the metal-poor ones, with an age dispersion of 1.0 Gyr (rms) and a total age range of ∼3 Gyr. About 15% of the intermediate-metallicity clusters are coeval with the oldest clusters. All the clusters with [Fe/H]>-0.8 are ∼1 Gyr younger than the most metal-poor ones, with a relatively small age dispersion, although the metal-rich sample is still too small to allow firmer conclusions. There is no correlation of the cluster age with the galactocentric distance. We briefly discuss the implication of these observational results for the formation history of the Galaxy.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Evolution - Galaxy: Formation - Galaxy: Globular Clusters: General

Simbad objects: 61

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Number of rows : 61
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 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 NGC 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 1130 0
3 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 1167 0
4 NGC 1261 GlC 03 12 16.21 -55 12 58.4     8.63     ~ 579 0
5 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1529 0
6 M 79 GlC 05 24 10.59 -24 31 27.3     8.16     ~ 883 0
7 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1540 0
8 NGC 3201 GlC 10 17 36.82 -46 24 44.9           ~ 1001 0
9 NGC 4147 GlC 12 10 06.149 +18 32 31.78   11.45 10.74     ~ 616 0
10 NGC 4372 GlC 12 25 45.43 -72 39 32.7   10.86 9.85     ~ 327 0
11 Cl Ruprecht 106 GlC 12 38 40.20 -51 09 01.0           ~ 413 0
12 M 68 GlC 12 39 27.98 -26 44 38.6     7.96     ~ 1069 0
13 NGC 4833 GlC 12 59 33.92 -70 52 35.4           ~ 467 0
14 M 53 GlC 13 12 55.25 +18 10 05.4     7.79     ~ 907 0
15 NGC 5053 GlC 13 16 27.09 +17 42 00.9     9.96     ~ 675 0
16 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
17 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2593 0
18 NGC 5466 GlC 14 05 27.29 +28 32 04.0     9.70     ~ 887 0
19 NGC 5634 GlC 14 29 37.28 -05 58 35.1   10.69 10.05     ~ 333 0
20 NGC 5694 GlC 14 39 36.52 -26 32 18.0           ~ 323 0
21 IC 4499 GlC 15 00 18.57 -82 12 49.6     8.56     ~ 375 0
22 NGC 5824 GlC 15 03 58.612 -33 04 06.70   10.28 9.56     ~ 441 0
23 NGC 5897 GlC 15 17 24.40 -21 00 36.4   10.16 8.52     ~ 424 0
24 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
25 NGC 5927 GlC 15 28 00.69 -50 40 22.9           ~ 499 0
26 NGC 5946 GlC 15 35 28.58 -50 39 35.0           ~ 210 0
27 NGC 5986 GlC 15 46 03.00 -37 47 11.1     6.92     ~ 408 0
28 M 80 GlC 16 17 02.41 -22 58 33.9           ~ 780 0
29 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0
30 M 107 GlC 16 32 31.86 -13 03 13.6           ~ 835 0
31 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2291 0
32 M 12 GlC 16 47 14.18 -01 56 54.7     6.07     ~ 736 0
33 NGC 6235 GlC 16 53 25.36 -22 10 38.8   11.99 7.20     ~ 208 0
34 M 10 GlC 16 57 09.05 -04 06 01.1     4.98     ~ 857 0
35 M 62 GlC 17 01 12.60 -30 06 44.5           ~ 668 0
36 M 19 GlC 17 02 37.69 -26 16 04.6   8.45 5.57     ~ 406 1
37 NGC 6284 GlC 17 04 28.747 -24 45 51.22   10.72 7.43     ~ 302 0
38 NGC 6287 GlC 17 05 09.4906767360 -22 42 28.099250172   11.49 10.30     ~ 240 0
39 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2240 0
40 NGC 6342 GlC 17 21 10.14 -19 35 14.7     10.01     ~ 310 0
41 NGC 6366 GlC 17 27 44.24 -05 04 47.5           ~ 344 0
42 NGC 6362 GlC 17 31 54.99 -67 02 54.0           ~ 637 0
43 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 2103 0
44 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
45 NGC 6544 GlC 18 07 20.58 -24 59 50.4   11.36 9.90     ~ 332 0
46 NGC 6584 GlC 18 18 37.60 -52 12 56.8     8.17     ~ 317 0
47 M 69 GlC 18 31 23.10 -32 20 53.1           ~ 492 0
48 NGC 6652 GlC 18 35 45.63 -32 59 26.6           ~ 474 0
49 M 70 GlC 18 43 12.76 -32 17 31.6           ~ 421 0
50 NGC 6717 GlC 18 55 06.04 -22 42 05.3           ~ 273 0
51 NGC 6723 GlC 18 59 33.15 -36 37 56.1           ~ 543 0
52 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2121 0
53 Cl Terzan 7 GlC 19 17 43.92 -34 39 27.8           ~ 460 0
54 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 913 0
55 M 71 GlC 19 53 46.49 +18 46 45.1           ~ 1190 0
56 NGC 6934 GlC 20 34 11.37 +07 24 16.1           ~ 459 0
57 M 72 GlC 20 53 27.70 -12 32 14.3     8.96     ~ 465 0
58 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0
59 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 1114 1
60 M 30 GlC 21 40 22.12 -23 10 47.5     7.10     ~ 1121 0
61 Cl Pal 12 GlC 21 46 38.84 -21 15 09.4     11.89     ~ 548 0

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