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Table 2.

Parameters of the OB stars.

Star Spectral Teff
type [kK]
4 O7-9.5 I 33.0 ± 2.0 5.62 ± 0.23
6 O6-7 I 36.0 ± 2.0 5.75 ± 0.20
7 O6-7 III 40.0 ± 2.0 5.76 ± 0.21
9 O4-6 If+ 37.0 ± 2.0 6.01 ± 0.20
12 B0.5-2 I 22.5 ± 4.0 6.36 ± 0.30
17 O7-8 V-III 34.0* ± 3.0 5.24 ± 0.21
18 O9.5-B2 I 26.0* ± 6.0 5.76 ± 0.35
34 Early/emission 25.0 ± 3.0 4.99 ± 0.24
42 O7-8III-I 34.0* ± 3.0 5.38 ± 0.22
48 Early/emission 25.0 ± 3.0 5.91 ± 0.24
49 O7-9.5 I 35.0 ± 2.0 5.56 ± 0.22
50 O7-9.5 I 35.0 ± 2.0 5.47 ± 0.23
51 O6-8 III 38.0 ± 2.0 5.68 ± 0.22

Notes. Adopted parameters are marked with an asterisk (*) symbol.

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