Table 2
Ages and metallicities for Galactic GCs.
| Literature | This work | |||||
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| Cluster | Age | [Fe/H]C | [Fe/H]S | Age | [Fe/H] | |
| (Gyr) | (dex) | (dex) | (Gyr) | (dex) | ||
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| NGC 104 | 13.0 ± 2.6a | –0.76 ± 0.02 | –0.70 | 13.09 ± 1.76 | –0.79 ± 0.04 | |
| NGC 1851 | 10.6 ± 2.1a | –1.18 ± 0.08 | –1.21 | 10.26 ± 0.16 | –1.26 ± 0.01 | |
| NGC 1904 | 11.4 ± 2.4a | –1.58 ± 0.02 | –1.55 | 11.58 ± 0.22 | –1.84 ± 0.02 | |
| 10.24 ± 3.00 | –1.88 ± 0.05 | |||||
| NGC 2298 | 12.6 ± 2.6b | –1.96 ± 0.04 | –1.97 | 10.89 ± 1.34 | –2.00 ± 0.03 | |
| 10.32 ± 1.54 | –2.06 ± 0.02 | |||||
| NGC 2808 | 10.0 ± 2.2a | –1.18 ± 0.04 | –1.29 | 13.90 ± 0.07 | –1.24 ± 0.01 | |
| 13.87 ± 0.08 | –1.25 ± 0.01 | |||||
| NGC 3201 | 13.0 ± 1.9a | –1.51 ± 0.02 | –1.56 | 9.56 ± 0.24 | –1.35 ± 0.01 | |
| 11.75 ± 0.11 | –1.45 ± 0.01 | |||||
| NGC 5286 | 12.5 ± 2.5b | –1.70 ± 0.07 | –1.51 | 6.04 ± 4.46 | –1.78 ± 0.08 | |
| 9.19 ± 3.34 | –1.79 ± 0.07 | |||||
| 4.01 ± 2.97 | –1.66 ± 0.07 | |||||
| NGC 5904 | 10.6 ± 2.2a | –1.33 ± 0.02 | –1.26 | 9.26 ± 0.11 | –1.44 ± 0.00 | |
| 10.00 ± 0.16 | –1.41 ± 0.01 | |||||
| NGC 5927 | 12.1 ± 2.4a | –0.29 ± 0.07 | –0.64 | 11.38 ± 2.54 | –0.48 ± 0.04 | |
| 12.87 ± 1.73 | –0.50 ± 0.02 | |||||
| 12.77 ± 1.37 | –0.48 ± 0.02 | |||||
| NGC 5946 | 11.7 ± 3.0a | –1.29 ± 0.14 | –1.54 | 10.56 ± 1.93 | –1.76 ± 0.04 | |
| NGC 5986 | 11.6 ± 2.3a | –1.63 ± 0.08 | –1.53 | 10.14 ± 3.33 | –1.84 ± 0.05 | |
| NGC 6121 | 11.9 ± 2.3a | –1.18 ± 0.02 | –1.15 | 7.94 ± 0.14 | –1.35 ± 0.01 | |
| NGC 6171 | 13.0 ± 2.7a | –1.03 ± 0.02 | –1.13 | 13.22 ± 1.27 | –1.07 ± 0.03 | |
| 12.23 ± 1.47 | –1.05 ± 0.03 | |||||
| NGC 6218 | 12.1 ± 2.5a | –1.33 ± 0.02 | –1.32 | 11.08 ± 0.94 | –1.63 ± 0.02 | |
| NGC 6235 | 11.7 ± 3.0a | –1.38 ± 0.07 | –1.36 | 9.81 ± 1.07 | –1.26 ± 0.04 | |
| NGC 6254 | 11.3 ± 2.3a | –1.57 ± 0.02 | –1.51 | 11.73 ± 0.05 | –1.72 ± 0.02 | |
| NGC 6266 | 12.1 ± 2.4a | –1.18 ± 0.07 | –1.20 | 10.60 ± 0.10 | –1.22 ± 0.01 | |
| NGC 6284 | 11.4 ± 2.3a | –1.31 ± 0.09 | –1.27 | 10.21 ± 0.12 | –1.33 ± 0.01 | |
| 10.39 ± 0.48 | –1.28 ± 0.02 | |||||
| NGC 6304 | 13.5 ± 2.8b | –0.37 ± 0.07 | –0.66 | 14.69 ± 3.43 | –0.63 ± 0.06 | |
| NGC 6316 | –0.36 ± 0.14 | –0.90 | 14.83 ± 0.93 | –0.86 ± 0.02 | ||
| 14.46 ± 1.30 | –0.86 ± 0.03 | |||||
| NGC 6333 | –1.79 ± 0.09 | –1.65 | 10.49 ± 2.17 | –2.03 ± 0.03 | ||
| NGC 6342 | 12.3 ± 2.5a | –0.49 ± 0.14 | –1.01 | 13.13 ± 0.47 | –0.93 ± 0.01 | |
| 12.95 ± 0.85 | –0.84 ± 0.02 | |||||
| NGC 6352 | 12.6 ± 2.6b | –0.62 ± 0.05 | –0.70 | 12.24 ± 0.35 | –0.70 ± 0.01 | |
| NGC 6356 | –0.35 ± 0.14 | –0.74 | 14.26 ± 2.10 | –0.76 ± 0.04 | ||
| NGC 6362 | 12.1 ± 2.4a | –1.07 ± 0.05 | –1.17 | 14.53 ± 0.21 | –1.22 ± 0.01 | |
| NGC 6388 | 12.0 ± 2.6b | –0.45 ± 0.04 | –0.68 | 6.57 ± 1.10 | –0.62 ± 0.03 | |
| NGC 6441 | 11.2 ± 2.4b | –0.44 ± 0.07 | –0.65 | 6.09 ± 1.80 | –0.55 ± 0.04 | |
| 5.89 ± 0.67 | –0.54 ± 0.02 | |||||
| NGC 6522 | –1.45 ± 0.08 | –1.39 | 8.97 ± 0.43 | –1.24 ± 0.02 | ||
| NGC 6528 | 12.6 ± 2.5c | 0.07 ± 0.08 | –0.10 | 13.60 ± 1.42 | –0.29 ± 0.03 | |
| 12.39 ± 1.95 | –0.26 ± 0.04 | |||||
| NGC 6544 | 10.6 ± 2.3a | –1.47 ± 0.07 | –1.38 | 11.57 ± 0.91 | –1.34 ± 0.02 | |
| NGC 6553 | 13.0 ± 2.5d | –0.16 ± 0.06 | –0.20 | 10.35 ± 4.23 | –0.29 ± 0.08 | |
| NGC 6569 | –0.72 ± 0.14 | –1.08 | 14.98 ± 0.15 | –1.06 ± 0.01 | ||
| NGC 6624 | 12.5 ± 2.6b | –0.42 ± 0.07 | –0.70 | 9.21 ± 1.53 | –0.70 ± 0.04 | |
| 11.21 ± 1.71 | –0.74 ± 0.04 | |||||
| NGC 6626 | –1.46 ± 0.09 | –1.21 | 10.39 ± 0.68 | –1.37 ± 0.02 | ||
| NGC 6637 | 11.9 ± 2.6a | –0.59 ± 0.07 | –0.78 | 13.38 ± 1.34 | –0.86 ± 0.03 | |
| NGC 6638 | –0.99 ± 0.07 | –1.08 | 12.96 ± 1.21 | –1.00 ± 0.02 | ||
| NGC 6652 | 12.1 ± 2.5a | –0.76 ± 0.14 | –1.10 | 11.72 ± 0.28 | –0.95 ± 0.01 | |
| 10.12 ± 0.15 | –1.01 ± 0.01 | |||||
| NGC 6723 | 12.7 ± 2.9a | –1.10 ± 0.07 | –1.14 | 12.78 ± 0.15 | –1.34 ± 0.01 | |
| NGC 6752 | 13.5 ± 2.9a | –1.55 ± 0.01 | –1.57 | 9.37 ± 3.75 | –1.86 ± 0.07 | |
| NGC 7078 | 12.5 ± 2.6a | –2.33 ± 0.02 | – | 6.82 ± 1.43 | –2.32 ± 0.01 | |
| 6.98 ± 1.19 | –2.32 ± 0.01 | |||||
| NGC 7089 | 11.9 ± 2.7a | –1.66 ± 0.07 | –1.49 | 10.36 ± 2.89 | –1.82 ± 0.06 | |
Notes. For GCs observed more than once, each spectrum was fitted separately. Our results correspond to the average and 1σ values of the MC simulations (see text in Sect. 3).
References. (a) De Angeli et al. (2005); (b) Marín-Franch et al. (2009); (c) Momany et al. (2003); (d) Beaulieu et al. (2001). Ages from references (a) and (b) were converted to absolute values adopting an age of 13 ± 2.5 Gyr for 47 Tuc (Zoccali et al. 2001), and errors are propagated from the original references. Columns 3 and 4: [Fe/H] from Carretta et al. (2009) and Schiavon et al. (2005), respectively. Columns 5 and 6: ages and [Fe/H] obtained in this work, respectively.
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