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Table 4

Estimated physical parameters of our sample of LMC late O-type stars, grouped according to their cluster membership.

VFTS Classification Location Teff log g log gc (1) R⋆ (2) log Q v sin i(3) vr ɛSi
(kK) (cm s−2) (cm s−2) (R⊙) (km s−1) (km s−1)
346 O9.7 III NGC 2070 31.4 ± 1.0 4.15 ± 0.10 4.15 6.44 −12.75 ± 0.20 75 265 7.00 ± 0.20
                     
412 O9.7 NGC 2070 31.0 ± 1.0 4.00 ± 0.10 4.00 5.40 −12.68 ± 0.2 80 270 7.10 ± 0.10
                     
444 O9.7 NGC 2070 31.0 ± 1.0 4.15 ± 0.10 4.16 7.22 −12.57 ± 0.2 100 265 7.10 ± 0.10
                     
528 O9.7(n) NGC 2070 30.8 ± 1.0 4.15 ± 0.10 4.16 7.65 −12.93 ± 0.2 150 270 7.00 ± 0.20
                     
569 O9.2 III: NGC 2070 32.6 ± 1.0 3.90 ± 0.10 3.90 7.49 −12.74 ± 0.20 35 255 7.00 ± 0.10
                     
571 (*) O9.5 II-III(n) NGC 2070 32.8 ± 2.0 4.25 ± 0.10 4.26 5.46 <−13.22 148 260 6.90 ± 0.20
                     
607 O9.7 III NGC 2070 32.0 ± 1.0 4.10 ± 0.10 4.10 5.97 −12.64 ± 0.20 60 265 7.00 ± 0.15
                     
615 O9.5 IIInn NGC 2070 32.0 ± 1.5 4.00 ± 0.15 4.08 10.30 −12.87 ± 0.20 372 270 7.00 ± 0.20
                     
620 O9.7 III(n) NGC 2070 32.0 ± 1.5 4.10 ± 0.15 4.15 4.82 −13.15 ± 0.20 208 275 7.00 ± 0.20
                     
622 O9.7 III NGC 2070 32.0 ± 1.0 4.20 ± 0.10 4.21 4.64 −12.86 ± 0.20 84 265 7.00 ± 0.10
070 O9.7 II NGC 2060 32.0 ± 1.0 4.00 ± 0.10 4.01 5.64 −13.35 ± 0.15 126 277 7.00 ± 0.20
                     
077 O9.5: IIIn NGC 2060 34.0 ± 1.5 4.20 ± 0.15 4.24 5.20 < −13.50 225 275 7.10 ± 0.30
                     
080 O9.7 II-III((n)) NGC 2060 32.0 ± 1.5 3.85 ± 0.15 3.89 7.55 < −13.50 190 275 7.00 ± 0.20
                     
091 O9.5 IIIn NGC 2060 32.0 ± 1.5 3.80 ± 0.15 3.88 7.98 < −13.50 308 275 7.10 ± 0.30
                     
113 O9.7 II/B0 IV? NGC 2060 32.0 ± 1.0 4.25 ± 0.10 4.25 5.19 −12.89 ± 0.12 35 275 7.00 ± 0.15
                     
128 O9.5 III:((n)) NGC 2060 33.0 ± 1.0 4.15 ± 0.15 4.17 5.01 < −13.28 180 270 7.00 ± 0.20
                     
131 O9.7 NGC 2060 32.8 ± 1.0 4.38 ± 0.10 4.39 4.49 −12.87 ± 0.3 124 275 7.10 ± 0.20
                     
141 O9.5 II-III((n)) NGC 2060 32.3 ± 1.0 4.20 ± 0.15 4.21 8.44 −12.87 ± 0.20 160 275 7.00 ± 0.20
                     
188 (*) O9.7: III NGC 2060 34.0 ± 2.0 4.40 ± 0.10 4.40 6.42 −13.22 ± 0.31 100 275 7.00 ± 0.20
                     
192 (*) O9.7 II/B0 IV NGC 2060 31.7 ± 2.0 4.13 ± 0.10 4.13 4.85 −13.05 ± 0.17 40 270 7.10 ± 0.20
                     
205 O9.7 II((n))/B0 IV((n)) NGC 2060 31.0 ± 1.0 4.30 ± 0.15 4.31 6.29 < −13.50 158 265 6.90 ± 0.20
                     
207 O9.7 II((n)) NGC 2060 31.4 ± 1.0 4.20 ± 0.15 4.21 5.76 −13.20 ± 0.3 160 270 7.10 ± 0.20
                     
210 O9.7 II-III((n)) NGC 2060 32.0 ± 1.0 4.00 ± 0.15 4.02 6.47 −12.78 ± 0.2 162 275 7.10 ± 0.10
104 O9.7 II-III((n)) Field 32.0 ± 1.5 4.10 ± 0.15 4.14 5.10 −13.50 ± 0.30 198 260 7.00 ± 0.20
                     
226 O9.7 III Field 33.0 ± 1.0 4.20 ± 0.10 4.20 5.31 −13.50 ± 0.3 64 190 7.10 ± 0.10
                     
328 O9.5 III(n) Field 33.6 ± 1.5 4.15 ± 0.15 4.19 5.12 < −13.28 240 300 7.00 ± 0.20
                     
370 O9.7 III Field 32.0 ± 1.0 4.00 ± 0.10 4.00 5.88 < −13.47 75 230 7.00 ± 0.15
                     
495 O9.7 II-IIIn Field 32.0 ± 1.5 4.20 ± 0.15 4.22 6.44 −13.50 ± 0.2 218 270 7.00 ± 0.20
                     
574 O9.5 IIIn Field 32.0 ± 1.5 4.10 ± 0.15 4.17 5.17 < −13.38 270 270 6.90 ± 0.20
                     
753 O9.7 II-III Field 32.5 ± 1.0 4.00 ± 0.10 4.00 7.74 < −13.50 40 270 7.20 ± 0.10
                     
787 (+) O9.7 III Field 32.8 ± 1.0 4.35 ± 0.10 4.35 5.77 −12.76 ± 0.2 40 275 7.00 ± 0.20
                     
843 O9.5 IIIn Field 32.0 ± 1.5 3.90 ± 0.15 4.02 6.03 < −13.50 318 275 7.10 ± 0.30
                     

Notes. In addition to standard abbreviations, log gc is the centrifugally corrected surface gravity. Estimates of log Q were derived assuming unclumped winds and β = 0.9. For all objects, YHe = 0.1 ± 0.02 was found. Uncertainties in our v sin i estimates range from 10 to ~20%, with higher values typical for more rapid rotators. (1) log gc = log[g + (v sin i)2 /R⋆], see e.g. Repolust et al. (2004); (2)adopted from RA17; (3)italicised values differ from those from RA17 by more than 1σ; (*) objects with asymmetric and blueshifted He II λ4686; (+) macroturblence of vmac = 45 km s−1 was needed to reproduce the observed line profiles.

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