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Table 2

Eclipsing O-star binaries with dynamical mass estimates.

Star Sp Type mdynamical mMSH1 mMSH2 mini mevol mstart mend Ref.

MW
HD93205A O3V 56.0  ±  4.0 58.3 58.0 67 –9/+9 65 –7/+7 67 –9/+6 64 –6/+8 (1)
FO15 A O5.5V 30.0  ±  1.0 34.2 34.4 40 –7/+8 39 –6/+7 39 –6/+6 38 –5/+7 (2)
FO15 B O9.5V 16.0  ±  1.0 16.5 15.6 18 –5/+4 18 –5/+4 18 –5/+4 18 –5/+4 (2)
Theta Orionis C1 O6Vpe 35.8  ±  7.2 31.7 31.0 35 –7/+6 34 –6/+5 34 –6/+5 33 –6/+6 (3)
V1036 Sco A O6V 32.0  ±  4.0 31.7 31.0 35 –7/+6 34 –6/+5 34 –6/+5 33 –6/+6 (4)
V1036 Sco B O7V 32.0  ±  4.0 26.5 25.3 28 –6/+8 27 –5/+7 27 –5/+6 27 –5/+7 (4)
LS1135 A O6.5V 30.0  ±  1.0 29.0 28.0 31 –7/+6 30 –6/+6 30 –6/+5 30 –6/+6 (5)
V729 Cyg O7Ianfp 47.0  ±  9.0 40.9 38.4 47 –9/+36 39 –5/+23 40 –6/+23 39 –5/+24 (4)
V1007 Sco A O7.5IIIa 29.5  ±  0.4 29.1 27.4 33 –5/+6 31 –4/+4 31 –5/+4 31 –4/+5 (6)
V1007 Sco B O7IIIa 30.1  ±  0.4 31.2 29.6 36 –5/+7 34 –4/+5 34 –4/+5 33 –4/+5 (6)
V3903 Sgr A O7V 27.3  ±  6.0 26.5 25.3 28 –6/+8 27 –5/+7 27 –5/+6 27 –5/+7 (4)
V3903 Sgr B O9V 19.0  ±  4.0 18.0 17.1 19 –5/+5 19 –5/+4 19 –5/+4 19 –5/+4 (4)
CPD –59 2603 A O7V 22.7  ±  4.0b 26.5 25.3 28 –6/+8 27 –5/+7 27 –5/+6 27 –5/+7 (4)
CPD –59 2603 B O9.5V 14.5  ±  4.0b 16.5 15.6 18 –5/+4 18 –5/+4 18 –5/+4 18 –5/+4 (4)
V1182 Aql A O8Vnn 31.0  ±  0.6 21.9 20.8 23 –6/+6 22 –5/+6 22 –5/+6 22 –5/+6 (7)
EM Car A O8V 22.9  ±  3.0 21.9 20.8 23 –6/+6 22 –5/+6 22 –5/+6 22 –5/+6 (4)
EM Car B O8V 21.4  ±  3.0 21.9 20.8 23 –6/+6 22 –5/+6 22 –5/+6 22 –5/+6 (4)
CC Cas O8.5III 18.3  ±  5.0 24.8 23.7 29 –5/+6 27 –4/+5 27 –4/+5 27 –4/+5 (4)
WR22 B O9V 20.6  ±  1.7 18.0 17.1 19 –5/+5 19 –5/+4 19 –5/+4 19 –5/+4 (8)
V478 Cyg A O9.5V 16.6  ±  9.0 16.5 15.6 18 –5/+4 18 –5/+4 18 –5/+4 18 –5/+4 (4)
V478 Cyg B O9.5V 16.3  ±  9.0 16.5 15.6 18 –5/+4 18 –5/+4 18 –5/+4 18 –5/+4 (4)
CPD –59 2628 A O9.5V 14.0  ±  20.0 16.5 15.6 18 –5/+4 18 –5/+4 18 –5/+4 18 –5/+4 (4)

LMC
LMC MACHO 053441.3 A O3If 41.2  ±  12.0 66.9 67.5 81 –10/+9 72 –8/+9 82 –10/+6 76 –5/+7 (4)
LMC MACHO 053441.3 B O6V 27.0  ±  12.0 31.7 31.0 37 –5/+3 36 –4/+3 37 –5/+3 36 –4/+3 (4)
LMC R136–38 A O3V 56.9  ±  6.0 58.3 58.0 64 –7/+7 64 –7/+7 64 –7/+7 64 –7/+7 (4)
LMC R136–38 B O6V 23.4  ±  2.0 31.7 31.0 37 –5/+3 36 –4/+3 37 –5/+3 36 –4/+3 (4)
LMC R136–42 A O3V 40.3  ±  1.0 58.3 58.0 64 –7/+7 64 –7/+7 64 –7/+7 64 –7/+7 (4)
LMC R136–42 B O3V 32.6  ±  1.0 58.3 58.0 64 –7/+7 64 –7/+7 64 –7/+7 64 –7/+7 (4)
LH 54–425 A O3V 50.0  ±  10.0 58.3 58.0 64 –7/+7 64 –7/+7 64 –7/+7 64 –7/+7 (9)
LH 54–425 B O5V 30.0  ±  6.0 37.3 38.1 44 –5/+5 44 –5/+5 44 –5/+4 43 –4/+5 (9)
LMC R136–77 A O5.5V 28.9  ±  3.0 34.2 34.4 40 –5/+4 40 –5/+4 40 –5/+4 39 –4/+4 (4)
LMC R136–77 B O5.5V 26.2  ±  3.0 34.2 34.4 40 –5/+4 40 –5/+4 40 –5/+4 39 –4/+4 (4)
LMC–SC1–105 A O7V 30.9  ±  1.0 26.5 25.3 31 –5/+3 30 –4/+3 31 –5/+3 30 –4/+3 (10)

Notes. For these massive stars dynamical mass estimates, mdyn, exist from the orbits of binaries. The other mass estimates are from the theoretical Teff calibration (mMSH1) and observational Teff calibration (mMSH2) by MSH05, together with the initial (mini), mean evolutionary (mevol), minimal (mstart) and maximal (mend) present-day mass from this work. The horizontal lines separates objects in the LMC from Galactic ones. All masses are in M. For the Milky Way stars Table 4 was used to derive the masses and for the LMC stars Table 6.

(a)

Different luminosity class determinations exist in the literature. The most recent one was used.

(b)

Error assumed as none given.

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