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Table 6
Comparison of carbon and oxygen abundances measured in WC and WO stars.
| Reference | Galaxy | Spectral type | Mass fraction | Number abundance | ||
| C | O | C/He | O/He | |||
|
|
||||||
| This work | IC 1613 | WO3 | 0.46 | 0.10 | 0.35 | 0.06 |
| Gräfener et al. (1998) | LMC | six WC4 | 0.4 | 0.1−0.3 | ||
| Crowther et al. (2000) | LMC | WO | 0.7 | 0.15 | ||
| Crowther et al. (2002) | LMC | six WC4 | 0.2−0.4 | 0.1 | 0.1−0.35 | ≤0.06 |
| Hillier & Miller (1999) | MW | WC5 | 0.4 | 0.1 | ||
| De Marco et al. (2000) | MW | WC8 | 0.15 | 0.03 | ||
| Dessart et al. (2000) | MW | four WC | 0.08−0.25 | 0.02−0.1 | ||
| Gräfener et al. (2002) | MW | WC5 | 0.45 | 0.04 | ||
| Crowther et al. (2006) | MW | WC9 | 0.2 | 0.01 | ||
| Smartt et al. (2001) | M31 | WC6 | 0.1 | |||
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