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Table 3
Determined abundances and isotopic ratios for programme stars.
| Star | [C/Fe] | σ [C/Fe] | [N/Fe] | σ [N/Fe] | [O/Fe] | σ [O/Fe] | C/N | 12C/13C | Evol. |
|
|
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| Collinder 261 | |||||||||
| RGB02 | −0.20 | 0.04 | 0.16 | 0.02 | −0.10 | 0.05 | 1.74 | 18 | g |
| RGB05 | −0.27 | 0.04 | −0.01 | 0.05 | −0.09 | 0.05 | 2.19 | 8 | c |
| RGB06 | −0.21 | 0.05 | 0.29 | 0.04 | 0.09 | 0.05 | 1.26 | 13 | c |
| RGB07 | −0.23 | 0.01 | 0.20 | 0.02 | 0.01 | 0.05 | 1.48 | – | c |
| RGB09 | −0.21 | 0.07 | 0.25 | 0.02 | −0.04 | 0.05 | 1.38 | 12 | c |
| RGB10 | −0.20 | 0.03 | 0.17 | 0.01 | −0.05 | 0.05 | 1.70 | – | c |
| RGB11 | −0.23 | 0.01 | 0.17 | 0.03 | −0.11 | 0.05 | 1.58 | 12 | c |
|
|
|||||||||
| Average: | −0.23 ± 0.02 | 0.18 ± 0.09 | −0.03 ± 0.07 | 1.60 ± 0.30 | 11 ± 2 | ||||
|
|
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| Melotte 66 | |||||||||
| 1346 | −0.32 | 0.02 | 0.13 | 0.03 | 0.13 | 0.05 | 1.41 | 8 | c |
| 1493 | −0.19 | 0.01 | 0.12 | 0.04 | 0.20 | 0.05 | 1.95 | 8 | c |
| 1785 | −0.23 | 0.01 | 0.10 | 0.05 | 0.10 | 0.05 | 1.86 | 6 | c |
| 1884 | −0.10 | 0.01 | 0.28 | 0.03 | 0.22 | 0.05 | 1.66 | – | c |
| 2218 | −0.21 | 0.01 | 0.23 | 0.07 | 0.14 | 0.05 | 1.45 | 10 | c |
|
|
|||||||||
| Average: | −0.21 ± 0.07 | 0.17 ± 0.07 | 0.16 ± 0.04 | 1.67 ± 0.21 | 8 ± 2 | ||||
Notes. Evol.: g – first ascent giant; c – He-core burning star. The first ascent giant RGB02 in Collinder 261 was not used for the average abundance calculations.
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