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Table 5
Ages and metallicities from literature, for our sample of M 31 GCs.
| Cluster | Age | [Fe/H] | Method | Reference |
| (Gyr) | (dex) | |||
| B126 | 3.40 ± 1.00 | –1.43 ± 0.42 | Spectral indices | a |
| 5.50 ± 3.50 | –1.56 ± 0.24 | Spectral indices | b | |
| 7.20 ± 3.10 | –1.39 ± 0.28 | Spectral indices | c | |
| B134 | 9.10 ± 2.20 | –0.99 ± 0.48 | Spectral indices | a |
| 11.90 ± 1.90 | –1.00 ± 0.38 | Spectral indices | b | |
| 11.30 ± 1.80 | 0.46 ± 0.11 | Spectral indices | c | |
| 5.50 ± 2.28 | –0.64 ± 0.08 | Photometry | d | |
| B158 | 9.90 ± 2.70 | –1.01 ± 0.24 | Spectral indices | a |
| 12.10 ± 0.90 | –0.84 ± 0.18 | Spectral indices | b | |
| 11.30 ± 1.50 | –0.70 ± 0.08 | Spectral indices | c | |
| 20.00 ± 5.57 | –1.02 ± 0.02 | Photometry | d | |
| B163 | 10.60 ± 3.70 | –0.25 ± 0.27 | Spectral indices | a |
| 10.20 ± 4.80 | –0.24 ± 0.22 | Spectral indices | b | |
| 7.70 ± 1.00 | –0.10 ± 0.06 | Spectral indices | c | |
| 11.75 ± 1.60 | –0.36 ± 0.27 | Photometry | d | |
| B222 | 0.70 ± 0.70 | 0.30 ± 0.60 | Spectral indices | e |
| 1.10 ± 0.40 | –0.65 ± 0.18 | Spectral indices | c | |
| 7.75 ± 1.46 | –0.93 ± 0.95 | Photometry | d | |
| B225 | 8.40 ± 1.90 | –0.49 ± 0.14 | Spectral indices | a |
| 9.10 ± 1.20 | –0.39 ± 0.18 | Spectral indices | b | |
| 9.90 ± 1.20 | –0.45 ± 0.05 | Spectral indices | c | |
| 15.50 ± 4.89 | –0.67 ± 0.12 | Photometry | d | |
| B234 | 10.30 ± 3.20 | –0.86 ± 0.18 | Spectral indices | a |
| 11.70 ± 5.70 | –0.84 ± 0.19 | Spectral indices | b | |
| 11.40 ± 2.00 | –0.54 ± 0.10 | Spectral indices | c | |
| B292 | 2.70 ± 1.20 | –1.91 ± 0.58 | Spectral indices | a |
| 5.90 ± 3.40 | –1.70 ± 0.20 | Spectral indices | b | |
| 9.20 ± 3.30 | –1.63 ± 0.49 | Spectral indices | c | |
| 1.00 ± 0.10 | –1.42 ± 0.16 | Photometry | f | |
| B301 | 3.20 ± 1.80 | –1.29 ± 0.31 | Spectral indices | a |
| 6.20 ± 1.10 | –1.27 ± 0.55 | Spectral indices | b | |
| 4.10 ± 3.70 | –0.50 ± 0.26 | Spectral indices | c | |
| –0.76 ± 0.25 | Photometry | f | ||
| B304 | 12.90 ± 4.70 | –1.55 ± 0.65 | Spectral indices | a |
| 11.90 ± 3.90 | –1.45 ± 0.43 | Spectral indices | b | |
| 13.20 ± 3.10 | –1.16 ± 0.46 | Spectral indices | c | |
| –1.32 ± 0.22 | Photometry | f | ||
| B305 | 0.40 ± 0.10 | –0.90 ± 0.61 | Photometry | f |
| B307 | 1.61 ± 0.10 | –0.41 ± 0.36 | Photometry | f |
| B310 | 19.50 ± 2.10 | –2.06 ± 0.51 | Spectral indices | a |
| 11.40 ± 3.50 | –1.69 ± 0.47 | Spectral indices | b | |
| 10.80 ± 3.10 | –1.24 ± 0.52 | Spectral indices | c | |
| –1.43 ± 0.28 | Photometry | f | ||
| B313 | 8.80 ± 1.20 | –1.05 ± 0.35 | Spectral indices | a |
| 11.70 ± 0.90 | –0.89 ± 0.50 | Spectral indices | b | |
| 11.20 ± 1.20 | –0.79 ± 0.32 | Spectral indices | c | |
| 7.28 ± 0.70 | –1.09 ± 0.10 | Photometry | f | |
| B314 | 0.50 ± 0.60 | 0.35 ± 0.25 | Spectral indices | e |
| 1.00 ± 0.10 | –0.35 ± 0.22 | Spectral indices | c | |
| B316 | 1.06 ± 0.10 | –1.47 ± 0.23 | Photometry | f |
| B321 | 0.30 ± 0.30 | 0.00 ± 0.60 | Spectral indices | e |
| 1.00 ± 0.10 | –1.98 ± 0.30 | Spectral indices | c | |
| B322 | 0.10 ± 0.50 | –0.20 ± 0.20 | Spectral indices | e |
| 2.30 ± 0.70 | –1.99 ± 0.43 | Spectral indices | c | |
| B324 | 0.90 ± 0.20 | –0.05 ± 0.40 | Spectral indices | e |
| 1.00 ± 0.10 | –0.58 ± 0.20 | Spectral indices | c | |
| B327 | 0.10 ± 0.90 | 0.30 ± 0.75 | Spectral indices | e |
| 5.40 ± 1.40 | –1.97 ± 0.34 | Spectral indices | c | |
| B328 | 16.80 ± 5.20 | –2.13 ± 0.35 | Spectral indices | a |
| 13.30 ± 1.30 | –1.69 ± 0.35 | Spectral indices | b | |
| 11.00 ± 2.40 | –2.29 ± 0.42 | Spectral indices | c | |
| B337 | 2.60 ± 1.90 | –1.18 ± 0.19 | Spectral indices | a |
| 6.60 ± 3.20 | –1.19 ± 0.25 | Spectral indices | b | |
| 4.90 ± 2.90 | –0.59 ± 0.11 | Spectral indices | c | |
| 2.03 ± 0.10 | –1.09 ± 0.32 | Photometry | f | |
| B347 | 8.70 ± 5.70 | –2.49 ± 0.21 | Spectral indices | a |
| 9.90 ± 4.00 | –1.93 ± 0.51 | Spectral indices | b | |
| 10.20 ± 2.40 | –2.61 ± 0.37 | Spectral indices | c | |
| 2.53 ± 0.15 | –1.71 ± 0.03 | Photometry | f | |
| B350 | 9.80 ± 2.50 | –1.98 ± 0.49 | Spectral indices | a |
| 12.40 ± 4.70 | –1.71 ± 0.33 | Spectral indices | b | |
| 9.30 ± 2.30 | –1.81 ± 0.37 | Spectral indices | c | |
| 1.99 ± 0.10 | –1.47 ± 0.17 | Photometry | f | |
| B354 | 5.24 ± 0.65 | –1.46 ± 0.38 | Photometry | f |
| B365 | 9.20 ± 3.10 | –1.59 ± 0.44 | Spectral indices | a |
| 10.40 ± 2.20 | –1.42 ± 0.51 | Spectral indices | b | |
| 6.60 ± 3.10 | –1.03 ± 0.20 | Spectral indices | c | |
| 1.73 ± 0.10 | –1.78 ± 0.19 | Photometry | f | |
| B380 | 0.45 ± 0.13 | 0.15 ± 0.10 | Spectral indices | e |
| 1.00 ± 0.10 | –1.69 ± 0.13 | Spectral indices | c | |
| B383 | 10.30 ± 2.20 | –0.68 ± 0.18 | Spectral indices | a |
| 10.60 ± 1.30 | –0.68 ± 0.31 | Spectral indices | b | |
| 11.30 ± 2.40 | –0.59 ± 0.08 | Spectral indices | c | |
| 13.99 ± 1.05 | –0.48 ± 0.20 | Photometry | f | |
| B393 | 10.00 ± 1.80 | 0.00 ± 0.00 | Spectral indices | a |
| 11.90 ± 1.30 | –0.80 ± 0.47 | Spectral indices | b | |
| 11.20 ± 1.40 | –0.60 ± 0.14 | Spectral indices | c | |
| 6.76 ± 1.10 | –1.41 ± 0.05 | Photometry | f | |
| B398 | 12.10 ± 1.50 | –0.71 ± 0.41 | Spectral indices | a |
| 14.70 ± 3.70 | –0.52 ± 0.28 | Spectral indices | b | |
| 15.00 ± 2.40 | –0.54 ± 0.10 | Spectral indices | c | |
| B401 | 9.20 ± 5.80 | –2.49 ± 0.49 | Spectral indices | a |
| 15.00 ± 5.10 | –2.38 ± 0.24 | Spectral indices | b | |
| 10.20 ± 2.40 | –2.38 ± 0.32 | Spectral indices | c | |
| 3.49 ± 0.40 | –1.75 ± 0.29 | Photometry | f | |
| MGC1 | 7.10 ± 3.00 | –1.37 ± 0.15 | Spectral indices | g |
| MCGC5 | 10.00 ± 3.00 | –1.33 ± 0.12 | Spectral indices | g |
| MCGC10 | 12.60 ± 3.00 | –1.73 ± 0.20 | Spectral indices | g |
| NB16 | 2.00 ± 1.40 | –1.40 ± 0.18 | Spectral indices | a |
| 4.60 ± 0.80 | –1.33 ± 0.24 | Spectral indices | b | |
| 7.20 ± 3.50 | –1.11 ± 0.15 | Spectral indices | c | |
| NB89 | 8.30 ± 2.60 | –0.78 ± 0.14 | Spectral indices | a |
| 14.40 ± 2.70 | –0.84 ± 0.15 | Spectral indices | b | |
| 6.80 ± 1.70 | –0.58 ± 0.08 | Spectral indices | c | |
Notes. We did not find in the listed literature the parameters for two clusters in our sample, B302 and B331.
References. (a) Beasley et al. (2005) (models by Bruzual & Charlot 2003); (b) Beasley et al. (2005) (models by Thomas et al. 2003, 2004); (c) Puzia et al. (2005); (d) Fan et al. (2006); (e) Beasley et al. (2004); (f) Wang et al. (2010), and; (g) Alves-Brito et al. (2009). Regarding the references (a), (b) and (c), we converted their [Z/H] to [Fe/H] through Eq. (4) in Thomas et al. (2003).
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