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Table 1.
Clusters used in this study.
| Cluster | 
|
log(Age) (ii) (years) | 
|
|---|---|---|---|
| Open clusters | |||
| King 7 | 5 | 8.82 (iv) | −0.06 |
| Berkeley 71 | 5 | 9.00 (iv) | −0.21 |
| IC 166 | 6 | 9.00 (iv) | −0.07 |
| NGC 2158 | 18 | 9.02 (iv) | −0.15 |
| NGC 1245 | 22 | 9.03 (iv) | −0.06 |
| King 5 | 6 | 9.10 (iv) | −0.12 |
| NGC 7789 | 32 | 9.15 (iv) | 0.03 |
| NGC 1798 | 5 | 9.25 (iv) | −0.19 |
| NGC 2420 | 15 | 9.30 (iv) | −0.13 |
| NGC 6819 | 81 | 9.36 (iv) | 0.10 |
| NGC 2682 | 14 | 9.45 (iv) | 0.05 |
| M 67 | 46 | 9.45 (iv) | 0.07 |
| Berkeley 66 | 6 | 9.60 (iv) | −0.15 |
| NGC 188 | 15 | 9.88 (iv) | 0.13 |
| NGC 6791 | 58 | 9.92 (iv) | 0.39 |
| Berkeley 17 | 6 | 10.00 (iv) | −0.12 |
| Globular clusters | |||
| M 5 | 27 | 10.62 (v) | −1.17 |
| M 3 | 20 | 11.39 (v) | −1.38 |
| M 13 | 9 | 11.65 (v) | −1.49 |
| M 15 | 6 | 12.93 (v) | −2.39 |
| M 71 | 9 | 13.70 (v) | −0.71 |
| M 107 | 12 | 13.95 (v) | −0.97 |
| M 92 | 8 | 14.20 (vi) | −2.33 |
| All | 431 | – | – |
Notes.
(i)N⋆ is the number of cluster members.
(ii)The logarithm of the cluster ages.
(iii)Mean iron abundance.
References.(iv) Dias et al. (2002).
(v) Forbes & Bridges (2010), Marín-Franch et al. (2009).
(vi) Paust et al. (2007).
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