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Table 1

Basic parameters of our targets (sorted by membership and spectral type).

Object ID ST Membership d R V B − V Sp. status MV
(kpc) (mag) (mag) (mag)
HD 64568 O3 V((f*))z Pup OB1/NGC 2467 2.51 H78 3.10 9.40 0.074 SB1? −3.79
HD 64568a 5.52 KH00 3.10 −5.50
HD 63005 O6.5 IV((f)) Pup OB1 2.51 H78 3.10 9.13 −0.028 S −3.74
HD 63005a 5.69 KH00 3.10 −5.45
HD 46223 O4 V((f)) Mon OB2/NGC 2244 1.51 H78 3.10 7.27 0.218 S −5.26
HD 46202 O9.2 V Mon OB2/NGC 2244 1.51 H78 3.10 8.18 0.177 S −4.22
HD 93843 O5 III(fc) Car OB1 2.6 H78 3.10 7.32 −0.030 SB1? −5.63
HD 93843a 3.68 KS10 3.10 −6.38
HD 91572 O6.5 V((f))z Car OB1 2.6 H78 3.10 8.22 0.036 SB1 −4.93
HD 91572a 2.77 KS10 3.10 −5.06
HD 91824 O7 V((f)z Car OB1 2.6 H78 3.10 8.17 −0.055 SB1 −4.93
HD 91824a 3.1 KS10 3.10 −5.08
HD 94370 O7(n)fp Car OB1 G87 2.6 H78 3.10 7.94 0.077 SB2? −5.25
HD 94370a 2.6 KS10 3.10 −5.25
HD 94370b field, GOSV3 −5.60
HD 92504 O8.5 V(n) Car OB1: 2.6 H78 3.10 8.42 −0.053 S −4.45
HD 94963 O7 II(f) Car OB2 G87 2.0 H78 3.10 7.16 −0.087 SB2? −4.94
HD 94963a 2.6 KS10 3.10 −5.53
HD 94963b field, GOSV3 −5.90
HD 93204 O5.5 V((fc)) Tr 16 2.90 HSB12 4.40 HSB12 8.44 0.095 S −5.65
HD 93204a 3.50 P01 3.70 P01 −5.78
CPD−59 2600 O6 V((f)) Tr 16 2.90 HSB12 4.40 HSB12 8.83 0.210 SB1 −5.77
CPD−59 2600a 2.20 P01 4.17 P01 −5.05
CPD−58 2620 O7 Vz Tr 14 2.90 HSB12 4.40 9.27 0.180 S −5.20
CPD−58 2620a 2.20 P01 3.50 T03 −4.16
HD 93222 O7 V((f))z Cr 228 2.60 F95 3.20 8.10 0.045 S −5.11
CD−47 4551 O5 Ifc Vela OB1: 1.75 R00 3.70 R00 8.39 0.890 WCB −7.15
HD 75211 O8.5 II((f)) Vela OB1 1.75 R00 3.70 R00 7.51 0.397 SB1 −6.12
HD 76968 O9.2 Ib Vela OB1: R00 1.75 R00 3.70 R00 7.08 0.133 SB1 −5.66
HD 76968a field:, GOSV3 −6.20
CD −44 4865 O9.7 III Vela OB1 1.75 R00 3.70 R00 9.43 0.691 S −5.49
HD 78344 O9.7 Iab Vela OB1: R00 1.75 R00 3.70 9.09 0.890 S −6.45
HD 75222 O9.7 Iab Vela OB1 R00 1.75 R00 3.70 R00 7.42 0.380 S −6.23
HD 75222a field, GOSV3 – −6.50
HD 151804 O8 Iaf Sco OB1/NGC6231 1.91 H78 3.10 5.23 0.066 WCB −7.24
HD 152249 OC9 Iab Sco OB1/NGC6231 1.91 H78 3.10 6.46 0.193 S −6.41
HD 152003 O9.7 Iab Nwk Sco OB1/NGC6231 1.91 H78 3.10 7.03 0.374 S −6.40
HD 169582 O6 Iaf field S −7.0
CD −43 4690 O6.5 III field S −5.6
HD 69464 O7 Ib(f) field S −6.3
HD 97848 O8 V field S −4.4
HD 302505 O8.5 III field S −5.6
HD 148546 O9 Iab field G87 S −6.5
HD 69106 O9.7 IIn field S −5.3

Notes. Cluster and association members are listed in the upper part, field stars in the lower. Uncertain membership is denoted by “:”. For objects with more than one entry see text. Spectral types are taken from Sota et al. (2014) with complementary data from Markova et al. (2011) and Markova et al. (2014); V and B − V magnitudes are from the Galactic O-star catalogue (Maíz-Apellániz et al. 2004) with individual data from the HIPPARCOS main catalogue. Absolute magnitudes, MV, have been determined following the procedure outlined in Sect. 2.1. Boldface numbers in Col. 9 are those used in the present study. S = single star; ? = suspected binarity; WCB = wind colliding binary.

References. GOSV3 = Sota et al. (2008); H78 = Humphreys (1978); HSB12 = Hur et al. (2012); G87 = Gies (1987); KH00 = Kaltcheva & Hilditch (2000); KS10 = Kaltcheva & Scorcio (2010); P01 = Patriarchi et al. (2001); R00 = Reed (2000); T03 = Tapia et al. (2003).

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