Table 5
Fundamental parameters for the early O-star sample, assuming unclumped mass-loss.
| Star | Spectral type | Nitrogen | Teff | log g | log gtrue | R ∗ | log L ∗ | Ṁc | log Q | β | v ∞ | vsini | v mac | Y He | [N] |
| Teff diag. | (kK) | (cgs) | (cgs) | (R⊙) | (L⊙) | (km s-1) | (km s-1) | (km s-1) | |||||||
|
|
|||||||||||||||
| Dwarfs | |||||||||||||||
| BI253a | O2 V((f∗)) | N iv/N v | 54.8 | 4.18 | 4.20 | 10.7 | 5.97 | 1.53 | –12.61 | 1.21 | 3180 | 230 | – | 0.08 | 7.90 |
| BI237a | O2 V((f∗)) | N iv/N v | 53.2 | 4.11 | 4.12 | 9.7 | 5.83 | 0.62 | –12.98 | 1.26 | 3400 | 140 | – | 0.09 | 7.38 |
| R136-040 | O2-3.5 V | – | > 51.0 | 4.01 | 4.02 | 10.3 | 5.81 | 1.93 | –12.53 | 0.80 | 3400 | 120 | – | 0.08 | 6.90 |
| N11-060a | O3 V((f∗)) | N iii/N iv/N v | 48.0 | 3.97 | 3.97 | 9.5 | 5.63 | 0.51 | –12.92 | 1.26 | 2740 | 68 | 40 | 0.12 | 8.20 |
| N iv/N v | 51.0 | 4.10 | 4.10 | 9.2 | 5.71 | 0.48 | –12.92 | 8.15 | |||||||
| AV 435b | O3 V((f∗)) | N iii/N iv | 46.0 | 3.90 | 3.91 | 13.8 | 5.88 | 0.21 | –13.15 | 0.80 | 1500 | 110 | – | 0.10 | 7.58 |
| LH 81:W28-23 | O3.5 V((f+)) | N iii/N iv/N v | 47.0 | 3.80 | 3.82 | 10.0 | 5.65 | 1.57 | –12.53 | 1.00 | 3050 | 146 | – | 0.25 | 8.40 |
| LH 101:W3-24 | O3.5 V((f+)) | – | 47.0 | 4.00 | 4.01 | 8.1 | 5.46 | 0.27 | –13.00 | 0.80 | 2400 | 120 | – | 0.10 | 7.78 |
| LH 81:W28-5 | O4 V((f+)) | N iii/N iv/N v | 44.0 | 3.80 | 3.81 | 9.8 | 5.51 | 1.08 | –12.60 | 0.80 | 2700 | 120 | 80 | 0.15 | 8.38 |
| AV 177b | O4 V((f)) | – | 44.0 | 3.80 | 3.85 | 8.8 | 5.42 | 0.23 | –13.19 | 0.80 | 2650 | 220 | – | 0.15 | 7.78 |
|
|
|||||||||||||||
| Giants | |||||||||||||||
| N11-031a | ON2 III(f∗) | N iii/N iv | 47.8 | 3.95 | 3.95 | 13.4 | 5.92 | 2.02 | –12.64 | 1.08 | 3200 | 71 | 60 | 0.11 | 7.83 |
| N iv/N v | 56.0 | 4.00 | 4.00 | 12.2 | 6.12 | 2.20 | –12.54 | 8.30 | |||||||
| NGC 346-355b | ON2 III(f∗) | N iv/N v | 55.0 | 4.00 | 4.01 | 12.0 | 6.08 | 2.50 | –12.39 | 0.80 | 2800 | 140 | – | 0.10 | 8.10 |
| N iii/N iv | 51.0 | 4.00 | 12.5 | 5.98 | 2.00 | –12.51 | – | 7.98 | |||||||
| N11-026a | O2 III(f∗) | N iii/N iv/N v | 49.0 | 4.00 | 4.00 | 11.3 | 5.82 | 1.56 | –12.63 | 1.08 | 3120 | 72 | 60 | 0.10 | 7.80 |
| N iv/N v | 52.0 | 4.10 | 4.10 | 11.0 | 5.89 | 1.49 | –12.63 | 7.75 | |||||||
| R136-018 | O3 III(f∗) | N iii/N iv/N v | 47.0 | 3.90 | 3.92 | 14.2 | 5.95 | 1.68 | –12.76 | 0.80 | 3200 | 180 | – | 0.10 | 8.18 |
| LH 90:ST 2-22 | O3.5 III(f+) | N iii/N iv/N v | 44.0 | 3.70 | 3.71 | 18.8 | 6.08 | 4.56 | –12.36 | 0.80 | 2560 | 120 | 80 | 0.15 | 8.58 |
|
|
|||||||||||||||
| Supergiants | |||||||||||||||
| Sk–67° 22 | O2 If∗/WN5 | N iii/N iv/N v | 46.0 | 3.70 | 3.74 | 12.4 | 5.80 | 15.00 | –11.60 | 0.80 | 2650 | 200 | – | 0.30 | 8.78 |
| LH 101:W3-19 | O2 If∗ | N iii/N iv/N v | 44.0 | 3.90 | 3.91 | 25.3 | 6.34 | 20.86 | –11.97 | 0.80 | 2850 | 180 | – | 0.10 | 8.18 |
| Sk–65° 47 | O4 If | N iii/N iv | 40.5 | 3.60 | 3.62 | 19.8 | 5.98 | 11.00 | –11.89 | 0.80 | 2100 | 160 | – | 0.12 | 7.78 |
Notes. log gtrue is the surface gravity corrected for centrifugal effects. For each star, the additional (or even primary) Teff diagnostics used in parallel with the He i/He ii ionization equilibrium is indicated. For four stars, two parameter sets are provided, because we had problems to reach a simultaneous fit for all considered lines from three nitrogen ionization stages. For N11-026 and N11-060 the first entry is our preferred one, and the second entry is a (disfavored) alternative, whereas for N11-031 (see Paper II) and NGC 346-355 we consider both solutions as possible. For errors, see text.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.