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Table 7

Spectrophotometric distances of individual early-type stars.

ID K s o A K s Spectral Class MK(I)b MK(III)b MK(V)b DM Ia DM IIIIa DM Va Region
[mag] [mag] [mag] [mag] [mag] [mag] [mag] [mag]

16 7.50 1.68 O9-9.5e I –5.39 ± 0.83 –4.47 ± 0.65 –3.30 ± 0.76 12.89 ± 0.83 11.97 ± 0.65 10.80 ± 0.76 REG4
15 7.93 1.59 O6-7fK+ I –5.28 ± 0.66 –4.84 ± 0.57 –3.99 ± 0.65 13.21 ± 0.66 12.77 ± 0.57 11.92 ± 0.65 GLIMPSE9
36 8.13 1.93 O6-7fK+ I –5.28 ± 0.66 –4.84 ± 0.57 –3.99 ± 0.65 13.41 ± 0.66 12.97 ± 0.57 12.12 ± 0.65 REG4
4 8.26 1.62 O7-8.5fK+ I –5.39 ± 0.83 –4.66 ± 0.61 –3.63 ± 0.71 13.65 ± 1.17 12.92 ± 1.02 11.89 ± 1.08 GLIMPSE9
14 8.32 1.86 O6-7fK+ I –5.28 ± 0.66 –4.84 ± 0.57 –3.99 ± 0.65 13.60 ± 0.66 13.16 ± 0.57 12.31 ± 0.65 GLIMPSE9
18 8.41 1.55 O6-7fK+ I –5.28 ± 0.66 –4.84 ± 0.57 –3.99 ± 0.65 13.69 ± 0.66 13.25 ± 0.57 12.40 ± 0.65 REG4
25 8.57 1.34 O4fK+ I –5.16 ± 0.63 –5.05 ± 0.63 –4.41 ± 0.78 13.73 ± 0.63 13.62 ± 0.63 12.98 ± 0.78 REG7
5 8.65 1.73 O6-7fK+ III –5.28 ± 0.66 –4.84 ± 0.57 –3.99 ± 0.65 13.93 ± 0.66 13.49 ± 0.57 12.64 ± 0.65 GLIMPSE9
9 8.65 1.75 O7-8.5fK+ III –5.39 ± 0.83 –4.66 ± 0.61 –3.63 ± 0.71 14.04 ± 0.84 13.31 ± 0.62 12.28 ± 0.72 GLIMPSE9
3 8.85 1.90 O6-7fK+ III –5.28 ± 0.66 –4.84 ± 0.57 –3.99 ± 0.65 14.13 ± 0.66 13.69 ± 0.57 12.84 ± 0.65 GLIMPSE9
23 9.04 1.39 O6-7fK+ III –5.28 ± 0.66 –4.84 ± 0.57 –3.99 ± 0.65 14.32 ± 0.66 13.88 ± 0.57 13.03 ± 0.65 REG4
17 9.21 1.37 O9-9.5fK+ III –5.39 ± 0.83 –4.47 ± 0.65 –3.30 ± 0.76 14.60 ± 0.83 13.68 ± 0.65 12.51 ± 0.76 REG4

[MFD2010] 3 6.48 1.48 B0-3 I –6.27 ± 0.92 –3.47 ± 1.43 –2.38 ± 1.27 12.75 ± 0.97 9.95 ± 1.46 8.86 ± 1.30 GLIMPSE9
[MFD2010] 4 7.48 1.66 B0-3 I –6.27 ± 0.92 –3.47 ± 1.43 –2.38 ± 1.27 13.75 ± 0.92 10.95 ± 1.43 9.86 ± 1.27 GLIMPSE9
6 9.02 1.51 B0-3 III –6.49 ± 1.14 –3.47 ± 1.43 –2.38 ± 1.27 15.51 ± 1.15 12.49 ± 1.43 11.40 ± 1.27 GLIMPSE9
31 9.05 1.26 B0-3 III –6.49 ± 1.14 –3.47 ± 1.43 –2.38± 1.27 15.54 ± 1.14 12.52 ± 1.43 11.43 ± 1.27 REG2
38 9.37 1.13 B0-3 III –6.49 ± 1.14 –3.47 ± 1.43 –2.38± 1.27 15.86 ± 1.14 12.84 ± 1.43 11.75 ± 1.27 REG4
21 9.64 1.11 B7.5-A2 III –7.04 ± 0.65 –0.41 ± 1.25 16.68 ± 0.65 10.05 ± 1.25 REG4
8 10.34 1.67 B0-3 III –6.49 ± 1.14 –3.47 ± 1.43 –2.38± 1.27 16.83 ± 1.14 13.81 ± 1.43 12.72 ± 1.27 GLIMPSE9

2 6.10 0.51 O9-9.5e I –5.39 ± 0.83 –4.47 ± 0.65 –3.30 ± 0.76 11.49 ± 0.83 10.57 ± 0.65 9.40 ± 0.76
19 9.94 0.42 B4-A2 V –7.04 ± 0.65 –0.41 ± 1.25 16.98 ± 0.65 10.35 ± 1.25 REG5
12 10.07 0.32 B4-A2 V –7.04 ± 0.65 –0.41 ± 1.25 17.11 ± 0.65 10.48 ± 1.25 REG5
13 10.08 0.29 B4-A2 V –7.04 ± 0.65 –0.41 ± 1.25 17.12 ± 0.65 10.49 ± 1.25 REG5
32 10.19 0.37 B4-A2 V –7.04 ± 0.65 –0.41 ± 1.25 17.23 ± 0.65 10.60 ± 1.25 REG5
26 10.42 0.31 B4-A2 V –7.04 ± 0.65 –0.41 ± 1.25 17.46 ± 0.65 10.83 ± 1.25 REG5
28 10.48 0.30 B4-A2 V –7.04 ± 0.65 -0.41 ± 1.25 17.52 ± 0.65 10.89 ± 1.25 REG5
7 10.54 0.42 B4-A2 V –7.04 ± 0.65 –0.41 ± 1.25 17.58 ± 0.65 10.95 ± 1.25 REG5
20 11.95 0.47 B4-A2 V –7.04 ± 0.65 –0.41 ± 1.25 18.99 ± 0.65 12.36 ± 1.25 REG4

Notes. Identification numbers from Table 2 are followed by de-reddened Ks, (Kso), AKs, spectral types, estimated luminosity classes, absolute magnitudes in the Ks-band for class I, III, V, distances, and regions. The table lists O-type stars with AKs> 0.8 mag, then B-stars with AKs> 0.8 mag, and finally star with AKs< 0.8 mag. Each block is ordered by de-reddened Ks.

(a)

Distance modulus for the estimated luminosity classes are marked in bold (see text).

(b)

Quoted errors on MK are calculated by assuming an error of 0.5 mag on a single type (e.g. Bibby et al. 2008; Humphreys & McElroy 1984). Note that the quoted MK values are used to derive spectrophotometric DMs. Later, in Table 9, we will assume a common distance and recalculate MK and Mbol .

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