Table 2
Estimates of the atmospheric parameters for the VFTS sample.
| VFTS | Teff (K) | log g | vt (km s−1) | |||
|---|---|---|---|---|---|---|
| Si | 4686Å | 4541Å | (cm s−2) | (1) | (2) | |
| 024 | 27 500 | 27 000 | – | 3.3 | 9 | 10 |
| 029 | 27 000 | 27 000 | – | 4.1 | 0 | 4 |
| 050 | 30 500 | 30 500 | 30 000 | 4.0 | 0 | 1 |
| 052 | 27 500 | 27 000 | – | 3.4 | 11 | 9 |
| 053 | 24 500 | – | – | 3.5 | 0 | 4 |
| 075 | 23 500* | – | – | 3.8 | 0 | 6 |
| 095 | 31 000 | 30 000 | – | 4.4 | 0 | 0† |
| 111 | 22 000* | – | – | 3.3 | – | 0† |
| 119 | 27 500 | 27 000 | – | 4.2 | 0† | 0† |
| 121 | 24 000 | – | – | 3.6 | 1 | 0 |
| 124 | 20 000 | – | – | 3.4 | – | 1 |
| 126 | 23 500* | – | – | 3.8 | 0 | 2 |
| 167 | 27 000 | – | – | 4.0 | 0 | 0 |
| 170 | 23 000 | – | – | 3.5 | 0 | 0 |
| 183 | 29 000 | 28 500 | 28 500 | 3.5 | 5 | 4 |
| 202 | 23 500* | – | – | 3.9 | 1 | 0 |
| 209 | 27 500 | 26 500 | – | 4.3 | 0 | 0 |
| 214 | 29 000 | 29 500 | 29 500 | 3.6 | 3 | 3 |
| 237 | 23 000 | – | – | 3.6 | 0 | 2 |
| 241 | – | 30 500 | 30 500 | 4.0 | – | 0 |
| 242 | 29 500 | 29 000 | 29 000 | 3.9 | 0 | 0 |
| 273 | 19 000 | – | – | 3.8 | – | 5 |
| 284 | 23 500* | – | – | 3.9 | 1 | 0 |
| 297 | 23 500* | – | – | 3.6 | 2 | 0† |
| 308 | 23 500* | – | – | 3.8 | 3 | 0† |
| 313 | 27 500 | 30 000 | 29 000 | 3.8 | 0 | 0† |
| 331 | 24 000* | – | – | 3.9 | 4 | 2 |
| 347 | 30 500 | 29 500 | 30 000 | 4.0 | 0 | 0 |
| 353 | 23 000* | – | – | 3.5 | – | 2 |
| 363 | 27 000 | 27 500 | 26 500 | 3.3 | 10 | 9 |
| 384 | 28 000 | 27 500 | 27 500 | 3.3 | 12 | 9 |
| 469 | 29 500 | – | 29 000 | 3.5 | 0 | 1 |
| 478 | 25 500 | 25 500 | – | 3.6 | 8 | 6 |
| 540 | 30 000 | 30 000 | 30 000 | 4.0 | 5 | 1 |
| 553 | 24 500 | – | – | 3.8 | 0 | 1 |
| 572 | 25 500 | – | – | 4.0 | 0 | 2 |
| 616 | 29 000 | 27 500 | – | 4.4 | 0 | 0† |
| 623 | 28 500 | 28 500 | 29 000 | 3.9 | 1 | 3 |
| 650 | 23 500* | – | – | 3.8 | 5 | 7 |
| 666 | 28 500 | 28 000 | – | 4.0 | 0 | 0 |
| 668 | 25 000 | 25 500 | – | 3.8 | 0 | 2 |
| 673 | 25 500 | – | – | 4.0 | 0 | 1 |
| 692 | 29 500 | 29 500 | 29 500 | 3.9 | 0 | 2 |
| 707 | 27 500 | 27 000 | – | 4.0 | 0 | 0 |
| 725 | 23 500 | 24 000 | – | 3.5 | 4 | 6 |
| 740 | 22 500 | – | – | 3.4 | 9 | 11 |
| 748 | 29 000 | 27 500 | – | 4.1 | 4 | 5 |
| 835 | 23 500* | – | – | 3.8 | 0 | 2 |
| 851 | 20 500 | – | – | 3.4 | – | 0 |
| 860 | 23 500* | – | – | 3.8 | 0 | 6 |
| 864 | 27 000 | – | – | 4.1 | 0 | 1 |
| 868 | 23 000* | – | – | 3.6 | 6 | 6 |
| 872 | 31 000 | 30 500 | 30 500 | 4.1 | 0 | 1 |
| 881 | 26 500 | 27 000 | – | 3.8 | 4 | 6 |
Notes. Effective temperatures (Teff) are from the silicon ionisation balance (Si) or He II profiles – those constrained by the absence of the Si II and Si IV spectra are marked with an asterisk. Microturbulences (vt) are from the relative strengths of the Si III triplet (method 1) or the absolute silicon abundance (method 2). Stars for which no solution could be found for the micrtoturbulence are identified by daggers.
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