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Table 4.
Mean abundances of first generation stars.
| Element | Terzan 2 | Terzan 4 | HP 1 | Terzan 9 | Djorg 2 | NGC 6540 | NGC 6642 |
|---|---|---|---|---|---|---|---|
| [C/Fe] | −0.03 | −0.30 | −0.24 | −0.37 | −0.11 | −0.06 | −0.13 |
| ±0.03 | ±0.01 | ±0.05 | ±0.05 | ±0.10 | – | – | |
| [N/Fe] | 0.37 | 0.37 | 0.24 | 0.39 | 0.20 | 0.04 | 0.25 |
| ±0.25 | ±0.16 | ±0.06 | ±0.21 | ±0.10 | – | – | |
| [O/Fe] | 0.28 | 0.24 | 0.23 | 0.19 | 0.30 | 0.33 | 0.28 |
| ±0.00 | ±0.01 | ±0.00 | ±0.04 | ±0.04 | – | – | |
| [Na/Fe] | 0.01 | 0.15 | −0.17 | −0.07 | −0.19 | 0.28 | 0.18 |
| ±0.03 | – | ±0.02 | ±0.20 | ±0.15 | – | – | |
| [Mg/Fe] | 0.38 | 0.25 | 0.27 | 0.22 | 0.34 | 0.29 | 0.34 |
| ±0.05 | ±0.00 | ±0.01 | ±0.06 | ±0.04 | – | – | |
| [Al/Fe] | 0.05 | −0.14 | −0.14 | −0.09 | 0.02 | −0.03 | 0.10 |
| ±0.01 | ±0.12 | ±0.03 | ±0.22 | ±0.11 | – | – | |
| [Si/Fe] | 0.25 | 0.23 | 0.27 | 0.21 | 0.29 | 0.27 | 0.35 |
| ±0.01 | ±0.02 | ±0.01 | ±0.04 | ±0.04 | – | – | |
| [K/Fe] | – | 0.17 | 0.12 | 0.30 | 0.20 | 0.23 | 0.20 |
| – | ±0.01 | ±0.15 | ±0.13 | ±0.02 | – | – | |
| [Ca/Fe] | 0.26 | (0.02) | 0.22 | 0.22 | 0.19 | 0.16 | 0.24 |
| ±0.01 | ±0.17 | ±0.05 | ±0.05 | ±0.06 | – | – | |
| [Mn/Fe] | – | −0.26 | −0.29 | −0.19 | −0.27 | −0.35 | −0.34 |
| – | ±0.04 | ±0.05 | ±0.05 | ±0.03 | – | – | |
| [Ni/Fe] | 0.02 | −0.01 | −0.07 | −0.01 | 0.00 | −0.03 | 0.05 |
| ±0.00 | ±0.08 | ±0.05 | ±0.03 | ±0.03 | – | – |
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