Table 3: Fundamental parameters determined using GA optimised spectral fits, with $T_{\rm eff}$ in kK, $\log{{g}}$ and $\log{{g}}_{\rm c}$ in cm s-2, $R_{\star }$ in $R_{\odot }$, $L_{\star }$ in $L_{\odot }$, $v_{\rm turb}$ and $v_{\rm r}\sin i$ in km s-1, $\dot{M}$ in $M_{\odot}~{\rm yr}^{-1}$, $M_{\rm s}$ and $M_{\rm ev}$ in $M_{\odot }$ and Q0 in number of photons per second. Results were obtained using a population of 72  FASTWIND models evolved over a minimum of 150 generations. Gravities corrected for centrifugal acceleration ( $\log{{g}}_{\rm c}$) were used to calculate the spectroscopic masses ($M_{\rm s}$). Evolutionary masses ( $M_{\rm ev}$) were derived from the tracks of Charbonnel et al. (1993). Note that "NGC'' is omitted from the identifications of the FLAMES targets.
ID ST $T_{\rm eff}$ $\log{{g}}$ $\log{{g}}_{\rm c}$ $R_{\star }$ $\log \mbox{$L_{\star}$ }$ $Y_{\rm He}$ $v_{\rm turb}$ $v_{\rm r}\sin i$ $\dot{M}$ $\beta$ $M_{\rm s}$ $M_{\rm ev}$ $\log \mbox{$Q_{0}$ }$
346-001 O7 Iaf+ 34.1 3.35 3.36 29.3 6.02 0.24 20.0 74 $6.04\times 10^{-6}$ 1.15 71.5 65.5 49.60
346-007 O4 V((f+)) 42.8 3.95 3.95 9.7 5.45 0.08 12.0 105 $2.30\times 10^{-7}$ 0.80 30.9 39.2 49.16
346-010 O7 IIIn((f)) 35.9 3.54 3.69 10.2 5.20 0.12 19.6 313 $6.02\times 10^{-7}$ 0.80 18.6 27.4 48.76
346-012 B1 Ib 26.3 3.35 3.35 12.1 4.80 0.07 11.1 29 $1.24\times 10^{-8}$ 0.74 12.0 16.6 46.75
346-018 O9.5 IIIe 32.7 3.33 3.37 11.1 5.10 0.10 0.0 138 $9.65\times 10^{-8}$ 0.80 10.6 23.6 48.55
346-022 O9 V 36.8 4.20 4.20 7.3 4.95 0.09 8.6 55 $1.06\times 10^{-7}$ 0.80 31.3 23.5 48.37
346-025 O9 V 36.2 4.07 4.08 7.2 4.90 0.10 6.3 138 $1.25\times 10^{-7}$ 0.80 23.0 22.6 48.31
346-026 B0 IV 32.6 3.76 3.76 9.2 4.93 0.11 10.6 67 $5.25\times 10^{-8}$ 0.80 17.7 20.7 48.06
346-028 OC6 Vz 42.9 3.97 3.97 6.5 5.10 0.16 10.3 27 $1.00\times 10^{-7}$ 0.80 14.3 31.9 48.81
346-031 O8 Vz 39.5 3.99 3.99 6.7 4.99 0.16 3.9 18 $5.71\times 10^{-8}$ 0.80 15.8 26.7 48.60
346-033 O8 V 39.9 4.44 4.45 6.6 4.99 0.07 17.5 188 $7.42\times 10^{-7}$ 0.80 44.2 27.1 48.54
346-046 O7 Vn 39.7 4.17 4.25 5.4 4.81 0.12 13.2 340 $1.01\times 10^{-7}$ 0.80 18.7 24.0 48.39
346-050 O8 Vn 37.2 4.16 4.25 5.2 4.67 0.13 10.2 357 $7.30\times 10^{-8}$ 0.80 17.9 20.6 48.12
346-051 O7 Vz 41.6 4.33 4.33 5.2 4.87 0.10 6.8 18 $1.73\times 10^{-7}$ 0.80 21.5 26.5 48.50
346-066 O9.5 V 35.6 4.25 4.26 5.2 4.59 0.09 16.4 129 $9.75\times 10^{-8}$ 0.80 18.0 18.9 47.88
346-077 O9 V 36.5 3.99 4.03 5.3 4.65 0.09 14.6 177 $7.22\times 10^{-8}$ 0.80 10.8 19.9 48.09
346-090 O9.5 V 34.9 4.26 4.28 5.3 4.56 0.09 11.3 188 $9.82\times 10^{-8}$ 0.80 19.4 18.3 47.76
346-093 B0 V 34.4 4.42 4.43 5.2 4.53 0.09 11.2 187 $1.49\times 10^{-7}$ 0.80 26.3 17.8 47.60
346-097 O9 V 37.5 4.49 4.49 5.6 4.75 0.08 8.5 22 $2.03\times 10^{-7}$ 0.80 35.5 21.7 48.14
346-107 O9.5 V 35.9 4.23 4.23 4.1 4.40 0.09 5.0 55 $4.06\times 10^{-8}$ 0.80 10.4 17.9 47.73
346-112 O9.5 V 34.4 4.15 4.17 4.3 4.36 0.10 15.6 143 $2.44\times 10^{-8}$ 0.80 9.8 16.6 47.53
330-013 O8.5 II-III((f)) 34.5 3.40 3.41 14.1 5.40 0.18 19.1 73 $2.96\times 10^{-7}$ 1.55 18.6 32.2 48.92
330-052 O8.5 Vn 35.7 3.91 4.02 5.2 4.60 0.16 11.3 291 $3.66\times 10^{-8}$ 0.80 10.5 19.0 48.00
AzV 14 O5 V 45.3 4.10 4.11 13.9 5.86 0.10 18.2 212 $2.67\times 10^{-7}$ 0.80 90.9 61.7 49.60
AzV 15 O7 II 39.4 3.69 3.70 18.3 5.82 0.10 2.9 135 $1.12\times 10^{-6}$ 1.12 60.9 53.9 49.53
AzV 26 O7 III 40.1 3.75 3.75 25.2 6.17 0.09 0.9 128 $1.71\times 10^{-6}$ 1.17 132.0 85.7 49.86
AzV 95 O7 III 38.2 3.66 3.66 13.8 5.56 0.13 13.2 68 $3.56\times 10^{-7}$ 1.16 32.1 39.3 49.19
AzV 243 O6 V 42.6 3.94 3.94 12.8 5.68 0.12 0.0 59 $2.64\times 10^{-7}$ 1.37 52.4 49.0 49.39
AzV 372 O9 Iabw 31.0 3.19 3.22 28.7 5.83 0.11 20.0 135 $2.04\times 10^{-6}$ 1.28 49.3 49.8 49.23
AzV 388 O4 V 43.3 3.95 3.96 10.6 5.55 0.09 13.2 163 $3.34\times 10^{-7}$ 0.80 37.5 43.4 49.27
AzV 469 O8.5 II((f)) 34.0 3.41 3.42 20.6 5.70 0.17 19.8 81 $1.10\times 10^{-6}$ 1.16 40.5 43.6 49.20

A value of $\beta=0.80$ corresponds to an assumed fixed value.

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