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Table 3
CNO abundances and isotopic ratios.
| Star | log ϵ(C) | log ϵ(N) | log ϵ(O) | 12C/13C | 16O/17O | 16O/18O | 17O/18O |
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| α Boo | 8.06 ± 0.09 (20) | 7.67 ± 0.13 | 8.76 ± 0.17 | 9 ± 2 (24) | 3030 ± 530 (7) | 1660 ± 400 (18) | 0.55 ± 0.12 |
| α Tau | 8.25 ± 0.12 (15) | 8.05 ± 0.11 | 8.48 ± 0.14 | 10 ± 2 (11) | 1670 ± 550 (6) | 666 ± 450 (9) | 0.4 ± 0.08 |
Notes. log ϵ(X) = log nx/nH + 12, where log nX is the number density of element X. The number between parenthesis indicates the number of lines used. The N and O abundances are adopted from the literature. We excluded features with both a 17O and 18O contribution (see text).
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