Table 7
Summary of stellar-atmosphere parameter determinations.
| Star | ℱ1 | ℱ2 | Teff | log g | ξ | vesini | Abundances | |||||
| (kK) | (cgs) | (kms-1) | (kms-1) | N | O | Mg | Si | N/O | ||||
|
|
||||||||||||
| VFTS 450 p | 1.00 | 0.00 | 25.5 | 2.7 | 15 | 99 | 7.32 | 7.75 | 6.93 | 6.70 | −0.43 | |
| ∗VFTS 450 p | 0.75 | 0.25 | 27.0 | 2.9 | 15 | 99 | 7.63 | 8.06 | 7.13 | 7.17 | −0.43 | |
| VFTS 450 p | 0.50 | 0.50 | 29.0 | 3.1 | 18 | 99 | 8.02 | 8.48 | 7.34 | 7.68 | −0.46 | |
| ∗VFTS 450 s | 0.75 | 0.25 | 33.5:35.0 | ≤3.8 | [10] | 320 | ··· | ··· | ··· | ··· | ··· | |
| VFTS 450 s | 0.50 | 0.50 | 28.5:31.0 | ≤3.4 | [10] | 320 | ··· | ··· | ··· | ··· | ··· | |
| VFTS 450 s | 0.00 | 1.00 | 25.5:27.5 | ≤3.0 | [10] | 320 | ··· | ··· | ··· | ··· | ··· | |
|
|
||||||||||||
| VFTS 652 p | 1.00 | 0.00 | 21.3 | 2.6 | 9 | 83 | 8.04 | 7.88 | 6.89 | 6.94 | +0.16 | |
| ∗VFTS 652 p | 0.75 | 0.25 | 22.2 | 2.8 | 13 | 83 | 8.13 | 7.96 | 7.00 | 7.07 | +0.17 | |
| VFTS 652 p | 0.50 | 0.50 | 23.0 | 3.0 | 19 | 83 | 8.31 | 8.08 | 7.15 | 7.28 | +0.23 | |
| ∗VFTS 652 s | 0.75 | 0.25 | 35.0 | 3.7 | [5] | 260 | ··· | ··· | ··· | ··· | ··· | |
| VFTS 652 s | 0.50 | 0.50 | 30.0 | 3.1 | [10] | 260 | ··· | ··· | ··· | ··· | ··· | |
| VFTS 652 s | 0.00 | 1.00 | 26.0 | 2.7 | [10] | 260 | ··· | ··· | ··· | ··· | ··· | |
|
|
||||||||||||
| Reference LMC baseline abundance: | 6.90 | 8.35 | 7.05 | 7.20 | −1.45 | |||||||
Notes. ℱ1,2 are the adopted fractional contributions of the primary, secondary (p, s) components to the total continuum flux, and ξ is the microturbulence (with assumed values given in square brackets). Baseline LMC abundances are taken from Hunter et al. (2007, on a logarithmic scale where the abundance of hydrogen by number ≡ 12). Abundances are given to two decimal places to clarify the sensitivity to ℱ values, and not to indicate the accuracy of the determinations (for which realistic errors are ≳ 0.2 dex, as discussed in Sect. 4.4). Similarly, projected rotation velocities are probably good to only ~10–20% (Sect. 4.5). Preferred solutions are indicated by asterisks.
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