Table 2.
Parameters and average maximum lithium abundance for the selected clusters, sorted by increasing age.
| Cluster | Age | RGC | [Fe/H] | A(Li)max | # of stars | Teff range |
|---|---|---|---|---|---|---|
| [Gyr] | [kpc] | [dex] | [dex] | [K] | ||
| ρ Oph (a) | 0.003 | 7.88 | (−0.265) | 3.28 ± 0.13 | 25 | 3006–4536 (pre-main sequence) |
| Alessi 43 | 0.011 | 8.18 | +0.02 ± 0.06 | 3.27 ± 0.22 | 46 | 3513–5135 (pre-main sequence) |
| 25 Ori (b) | 0.013 | 8.31 | (0.02) | 3.18 ± 0.14 | 7 | 3119–3386 (pre-main sequence) |
| Collinder 197 | 0.014 | 8.20 | (0.02) | 3.21 ± 0.15 | 64 | 3515–4441 (pre-main sequence) |
| NGC 2232 | 0.018 | 8.27 | (0.005) | 3.22 ± 0.11 | 14 | 5031–6891 (young) |
| NGC 2547 | 0.032 | 8.05 | (−0.055) | 3.35 ± 0.10 | 8 | 5748–6286 (young) |
| IC 4665 | 0.033 | 7.71 | (0.00) | 3.44 ± 0.10 | 5 | 5674–6133 (young) |
| NGC 6405 | 0.035 | 7.54 | (−0.01) | 3.31 ± 0.08 | 7 | 5848–6419 |
| IC 2602 | 0.036 | 7.95 | (−0.01) | 3.31 ± 0.13 | 4 | 5766–6438 (young) |
| Blanco 1 | 0.105 | 7.96 | −0.12 ± 0.07 | 3.15 ± 0.04 | 7 | 5923–6476 (young) |
| NGC 6067 | 0.126 | 6.16 | +0.03 ± 0.05 | 3.38 ± 0.09 | 15 | 6518–8000 |
| NGC 6709 | 0.190 | 7.22 | −0.03 ± 0.06 | 3.31 ± 0.01 | 2 | 6628–7410 |
| NGC 2516 | 0.240 | 7.98 | −0.04 ± 0.05 | 3.33 ± 0.07 | 3 | 6531–6839 |
| Berkeley 30 | 0.295 | 13.59 | −0.15 ± 0.05 | 3.11 ± 0.17 | 14 | 6630–6980 |
| NGC 6705 | 0.309 | 6.02 | +0.02 ± 0.01 | 3.34 ± 0.02 | 7 | 6673–6984 |
| NGC 3532 | 0.398 | 7.85 | −0.01 ± 0.05 | 3.25 ± 0.07 | 4 | 6825–6865 |
| NGC 6802 | 0.660 | 6.71 | +0.14 ± 0.04 | 3.32 ± 0.02 | 2 | 6677–6919 |
| NGC 2355 | 1.000 | 9.84 | −0.07 ± 0.05 | 3.17 ± 0.09 | 6 | 6716–6975 |
| Berkeley 81 | 1.148 | 5.21 | +0.22 ± 0.05 | 3.39 ± 0.11 | 1 | 6836 |
| Berkeley 73 | 1.413 | 14.97 | −0.26 ± 0.05 | 3.16 ± 0.11 | 8 | 6721–6885 |
| Berkeley 44 | 1.445 | 6.58 | +0.22 ± 0.05 | 3.21 ± 0.10 | 9 | 6564–6761 |
| NGC 2158 | 1.549 | 13.18 | −0.16 ± 0.05 | 3.19 ± 0.09 | 5 | 6585–6889 |
| Ruprecht 134 | 1.660 | 5.44 | +0.27 ± 0.05 | 3.47 ± 0.04 | 8 | 6697–6879 |
| NGC 2420 | 1.738 | 10.49 | −0.16 ± 0.05 | 3.19 ± 0.07 | 22 | 6378–6769 (turn-off) |
| Trumpler 20 | 1.862 | 6.82 | +0.13 ± 0.04 | 3.29 ± 0.12 | 7 | 6700–6928 |
| NGC 2243 | 4.365 | 11.00 | −0.44 ± 0.05 | 2.94 ± 0.10 | 7 | 6064–6314 (post turn-off) |
Notes. Ages were taken from Cantat-Gaudin et al. (2020). Galactocentric distances were computed with the astropy package (see Sect. 2.2). Average [Fe/H] from UVES members in GES iDR6 are reported for clusters older than 100 Myr, while for younger objects median (and more uncertain) [Fe/H] are given in brackets. The error bars associated with the average maximum 7Li abundances represent the standard deviation of the stars used to compute the mean.
Star forming region. Age and galactocentric distance from Spina et al. (2017).
ASCC 16 in Cantat-Gaudin et al. (2020).
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