Table 1
Sample of targets.
| Target | Spectral | Masses | Refs. | Cluster | Distance | Ref. | H | V | ||
| name | type(s) | (M⊙) | (kpc) | (mag) | (mag) | |||||
|
|
||||||||||
| HD 54662 | O6.5 V + O9 V | 29+18 | (a) | CMa OB1 | 1.1 ± 0.1 | (1) | 6.172 | 6.212 | ||
| HD 93250 | O4 III + ? | 49+? | (b) | Carina Ass. | 2.35 | (2) | 6.720 | 7.365 | ||
| HD 150136 | (O3 V + O6 V) + O7 V | (81)+27 | (c) | NGC 6193 | 1.32 ± 0.12 | (3) | 5.090 | 5.540 | ||
| HD 152233 | O5.5 III + O7.5 III/V | 38+30 | (d) | NGC 6231 | 1.52 | (4, 5) | 6.145 | 6.556 | ||
| HD 152247 | O9 III + O9.7 V | 23+16 | (d) | NGC 6231 | 1.52 | (4, 5) | 6.614 | 7.172 | ||
| HD 152314 | O8.5 V + B2 V | 19+10 | (d) | NGC 6231 | 1.52 | (4, 5) | 7.243 | 7.866 | ||
| HD 164794 | O3.5 V + O5.5 V | 50+34 | (e) | NGC 6530 | 1.25 ± 0.1 | (6) | 5.748 | 5.965 | ||
| HD 167971 | (O7.5III + O9.5III) + O9.5 I | (50)+26 | (f) | NGC 6604 | 1.75 ± 0.2 | (7) | 5.315 | 7.479 | ||
| HD 168137 | O7 V + O8 V | 22+24 | (d) | NGC 6611 | 1.8 ± 0.1 | (8) | 7.683 | 8.945 | ||
| CPD-47 2963 | O5 I + ? | 51+? | (g) | Vel OB1 | 1.3 | (9) | 6.060 | 8.45 | ||
Reference. (a) Boyajian et al. (2007); (b) Maíz-Apellániz et al. (2004); (c) Sana et al. (2013); (d) Sana et al. (2012); (e) Rauw et al. (2012); (f) De Becker et al. (2012); (g) Sota et al. (2014); (1) Kaltcheva & Hilditch (2000); (2) Smith (2006); (3) Herbst & Havlen (1977); (4) Sana et al. (2005); (5) Sung et al. (2013); (6) Prisinzano et al. (2005); (7) Ibanoglu et al. (2013); (8) Dufton et al. (2006); (9) Benaglia et al. (2006).
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