Table 6.
Averaged abundance values of the six clusters.
| Stellar cluster | Age | RGC | [Fe/H] | [Mg/Fe] | [Mg/H] | [F/Fe] | [F/H] | [Ce/Fe] | [Ce/H] |
|---|---|---|---|---|---|---|---|---|---|
| (Gyr) | (kpc) | (dex) | (dex) | (dex) | (dex) | (dex) | (dex) | (dex) | |
| NGC 6939 | 1.70 | 8.70 | −0.01 ± 0.01 | −0.12 ± 0.02 | −0.13 ± 0.02 | −0.19 ± 0.04 | −0.21 ± 0.04 | 0.14 ± 0.04 | 0.12 ± 0.05 |
| NGC 2420 | 1.74 | 10.68 | −0.16 ± 0.04 | −0.05 ± 0.03 | −0.21 ± 0.06 | −0.16 ± 0.04 | −0.31 ± 0.03 | 0.30 ± 0.04 | 0.14 ± 0.07 |
| Collinder 110 | 1.82 | 10.29 | −0.10 ± 0.04 | −0.08 ± 0.01 | −0.17 ± 0.03 | −0.27 ± 0.02 | −0.40 ± 0.01 | 0.14 ± 0.05 | 0.04 ± 0.08 |
| NGC 7762 | 2.04 | 8.78 | −0.03 ± 0.04 | −0.15 ± 0.03 | −0.18 ± 0.06 | −0.15 ± 0.04 | −0.18 ± 0.03 | 0.16 ± 0.04 | 0.13 ± 0.07 |
| NGC 7142 | 3.09 | 9.25 | 0.04 ± 0.01 | −0.10 ± 0.07 | −0.06 ± 0.07 | −0.23 ± 0.03 | −0.19 ± 0.01 | −0.05 ± 0.04 | −0.01 ± 0.03 |
| Berkeley 32 | 4.90 | 11.14 | −0.22 ± 0.08 | −0.09 ± 0.01 | −0.31 ± 0.12 | −0.15 ± 0.08 | −0.37 ± 0.04 | −0.04 ± 0.05 | −0.26 ± 0.14 |
Notes. The uncertainties mentioned above are computed from the root mean square deviation from the mean of the values obtained for individual stars within the cluster, except for NGC 7762 and NGC 2420, where we have only one star in our sample. For these clusters, the reported uncertainties are instead representative measures that are based on the average uncertainties of the other clusters.
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