Table 3
Stellar and wind parameters adopted for and derived from fitting the H/He plus carbon lines displayed in Figs. 9–14.
| Name | Sp. type-LC | Instrument | S/N | v sin i | vmac | Teff | log g | YHe | log Q | [C/H] |
|---|---|---|---|---|---|---|---|---|---|---|
| at 4500 Å | (km s−1) | (km s−1) | (kK) | [dex] | [dex] | [dex] | ||||
| HD 36512 | O9.7V | HERMES | 210 | 13 | 33 | 33.0–33.8 | 4.02–4.06 | 0.105 | − 13.4 | 8.25 ± 0.22 |
| HD 303311 | O6V | FEROS | 148 | 47 | 61 | 40.1–41.2 | 3.91–4.01 | 0.107 | − 13.0 | 8.33 ± 0.25 |
| HD 93128 | O3.5V | FEROS | 186 | 58 | 56 | 49.3–48.8 | 4.09–4.09 | 0.103 | − 12.7 | 8.23 ± 0.30 |
| HD 188209 | O9.5Iab/I | HERMES | 207 | 54 | 93 | 30.1–30.3 | 3.03–3.03 | 0.145 | − 12.4 | 8.23 ± 0.25 |
| HD 169582 | O6Ia | FEROS | 71 | 66 | 97 | 38.9–39.0 | 3.70–3.70 | 0.225 | − 12.3 | 8.53 ± 0.20 |
| CygOB2-7 | O3I | FIES | 31 | 75 | 10 | 50.3–51.0 | 4.09–4.09 | 0.139 | − 12.1 | 8.03 |
Notes. The two values for Teff and log g refer to the values provided by Holgado et al. (2018) and our final values, respectively. The carbon abundances derived for our two hottest objects (HD 93128 and CygOB2-7) rely mostly on only two lines from C IV, and should be considered with caution. See text.
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