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Table 5.

Spectral types and physical properties of the O, B, and A stars in the M 8 KMOS sample.

ID X-ray ID (CXOU J) Other ID Previous ST ST this work AK (mag) Teff (K) log L/L
Previously classified OB stars in M 8 included in our KMOS sample

14 180345.10−242205.2 CD-24 13810 B...(a) B2−B4V 0.23 ± 0.01 18 650 ± 1950 3.54 ± 0.14
33 180411.16−242145.1 NGC 6530 32 B3Ve (b) B1−B3 0.16 ± 0.03 21 500 ± 4500 3.35 ± 0.3
36 180415.03−242327.8 HD 315032 B1V (b) B1−B2Vz 0.16 ± 0.02 23 300 ± 2700 3.84 ± 0.17
O5 180423.99−242126.7 NGC 6530 60 B1Ve (b) O9−B1−SB2 0.17 ± 0.01 29 250 ± 3250 4.03 ± 0.13
O6 180424.29−242059.5 NGC 6530 61 B2Ve (b) B1−B2V 0.1 ± 0.02 23 300 ± 2700 3.47 ± 0.17
O7 180425.55−242044.9a NGC 6530 66 B2Vep (b) B0−B2V 0.13 ± 0.03 26 050 ± 5450 3.63 ± 0.28
O8 180427.19−242249.6 NGC 6530 70 B2Ve (b) B1−B2V 0.19 ± 0.02 23 300 ± 2700 3.5 ± 0.17
60 180428.98−242526.2 NGC 6530 74 B2.5Ve (b) B2−B5 0.1 ± 0.02 18 150 ± 2450 3.0 ± 0.19
O10 180432.98−242312.5a NGC 6530 80 B1V (b) O9−B1 0.17 ± 0.01 29 250 ± 3250 4.12 ± 0.13
73 180434.20−242200.6 NGC 6530 86 B2.5V (b) B0−B3V 0.3 ± 0.04 24 250 ± 7250 3.78 ± 0.4
O11 180439.92−242244.4 NGC 6530 99 B2.5Vne (b) B2−B5V 0.15 ± 0.02 18 150 ± 2450 2.97 ± 0.19
79 180441.68−242058.5 HD 164947A B1/2Vne (b) B2−B5V 0.11 ± 0.02 18 150 ± 2450 3.38 ± 0.19

Candidate OB stars in M 8 included in our KMOS sample

24 180400.80−242334.6 B0−B2V 0.84 ± 0.03 26 050 ± 5450 4.03 ± 0.28
48 180423.55−242116.8 G8−K0IV-V 0.21 ± 0.01 5385 ± 105 1.73 ± 0.03

New OB and A stars in M 8

16 180346.16−242149.4 B2−B5V 0.19 ± 0.02 18 150 ± 2450 2.84 ± 0.19
51 180424.29−242059.6 B2−B3V 0.07 ± 0.01 18 800 ± 1800 3.18 ± 0.12
55 180425.72−241949.6 A5−F2III-IV 0.17 ± 0.01 9752 ± 2948 2.29 ± 0.21
69 180433.03−242252.9 A0−A5V 0.01 ± 0.01 8890 ± 810 1.74 ± 0.12
F19 180404.31−242130.4 A5−F4V 0.02 ± 0.01 7940 ± 140 1.42 ± 0.03
F36 180420.48−242303.9 A8−F2III 1.38 ± 0.01 8055 ± 1251 2.4 ± 0.12
F44 180422.10−242546.6 B0−B3 0.63 ± 0.04 24 250 ± 7250 3.19 ± 0.4
F47 180426.73−242351.7 A5−A9V 0.2 ± 0.01 7760 ± 320 1.53 ± 0.05

Previously classified OB stars in M 8 not included in our KMOS sample

180340.32−242242.8 HD 164740 O7.5V+O9V+B0.5V (b) 36 000
180352.45−242138.5 HD 164794 O4V((f)) (b) 42 000 5.82
180356.85−241845.0 HD 164816 O9.5V+B0V (b) 31 500 4.94
180414.50−241437.0 HD 315026 B1.5V (b) 24 000
180420.55−241354.7 NGC 6530 55 B2.5Ve (b) 19 000 3.4
180421.27−242118.2 NGC 6530 56 B0.5V (b) 28 000 4.25
180422.74−242209.8 NGC 6530 58 B2Ve (b) 21 000
180423.22−242616.7 HD 315033 B2Vp (b) 21 000 3.99
180425.83−242308.4 HD 164906 B0Ve (b) 29 500
180428.02−242142.9 HD 315031 B1V (b) 26 000 4.42
180432.91−241844.6 NGC 6530 83 B2.5Vne (b) 19 000 3.41
180435.99−241952.2 HD 315021 B1V (b) 26 000
180441.65−242055.1 HD 164947B B2.5V (b) 19 000 3.42
180448.62−242635.5 NGC 6530 SJ 75 B2.5 (a) 19 000 3.5
180456.26−242403.4 HD 315034 B3 (a) 17 500 2.8
180459.03−242723.1 HD 315035 B3V (b) 17 500

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