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Table 1
Stellar parameters and isotopic ratios.
| Cluster | Star | Mass [M⊙] | Teff [K] | log g | 12C/13C Lit. | Ref. | [16O/H] | 16O/17O | 16O/18O | 12C/13C |
|
|
||||||||||
| NGC 7789 | 971 | 1.8 ± 0.2 | 3700 | 1.2 | – | (2) | –0.18 ± 0.1 | 300 |
340 |
15 ± 8 |
| 415 | 1.8 ± 0.2 | 3800 | 1.2 | – | (2) | –0.16 ± 0.1 | 250 |
270 |
19 ± 8 | |
| NGC 2548 | HD 68879 | 2.6 ± 0.3 | 4600 | 2.2 | 25 | (1) | – | – | – | 16 ± 7 |
| NGC 1545 | HD 27292 | 2.8 ± 0.2 | 4000 | 1.5 | 25 | (1) | − 0.33 ± 0.1 | 240 |
340 |
27 ± 10 |
| UMa Grp. | HD 30834 | 2.9 ± 0.4 | 4000 | 2.2 | 26 | (1) | − 0.36 ± 0.1 |
|
>200 | 22 ± 7 |
| NGC 2287 | HD 49050 | –a | 4100 | 1.6 | 23 | (1) | − 0.19 ± 0.1 | 300 |
–b | 30: |
| Tr 2 | HD 16068 | 4.5 ± 0.4 | 4000 | 1.5 | 30 | (1) | − 0.28 ± 0.1 | 280 |
370 |
28 ± 10 |
Notes.Data in Cols. 3 to 6 are taken from the literature.
Reference. (1) Gilroy (1989); (2) Prugniel et al. (2011).
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