Table 1.
Binary star physical properties.
| O-star | Adopted | Adopted | Mass at | Period | |||||
|---|---|---|---|---|---|---|---|---|---|
| Spectral | mass | mass | mass | end CHeB | Present | at end | LX time | LX time | |
| System | type | est. | (WR) | (O) | (WR) | period | CHeB | (Myr) | (Myr)/0.4 |
| WR21 | WN5+O4-5 | 37–60 | > 19 | > 37 | > 10 | 8.3 | 11.8 | 0.3 | 0.8 |
| WR30 | WC6+O6-8 | 24–50 | 16 | 34 | 14 | 18.8 | 20.4 | 0.0 | 0.0 |
| WR31 | WN4+O8V | 24–34 | > 11 | > 24 | > 7 | 4.8 | 6.1 | 2.5 | 6.3 |
| WR35a | WN6+O8.5V | 19–33 | 18 | 19 | 10 | 41.9 | 68.2 | 0.0 | 0.0 |
| WR42 | WC7+O7V | 27–37 | 16 | 27 | 14 | 7.9 | 8.7 | 1.8 | 4.5 |
| WR47 | WN6+O5V | 37–70 | > 40 | > 47 | > 20 | 6.2 | 10.5 | 0.6 | 1.5 |
| WR79 | WC7+O5-8 | 24–60 | > 10 | > 24 | > 7 | 8.9 | 10.7 | 1.1 | 2.8 |
| WR97 | WN5+O7 | > 30 | > 17 | > 30 | > 9 | 12.6 | 18.3 | 0.0 | 0.0 |
| WR113 | WC8+O8-9IV | 20–30 | > 11 | > 22 | > 8 | 29.7 | 35.9 | 0.0 | 0.0 |
| WR11 | WC8+O7.5III-V | 25–47 | 10 | 31 | 8 | 78.5 | 86.8 | 0.0 | 0.0 |
| WR127 | WN3+O8.5V | 17–24 | > 9 | > 20 | > 6 | 9.5 | 11.8 | 0.8 | 2.0 |
| WR139 | WN5+O6III-V | 28–59 | 9 | 28 | 6 | 4.2 | 5.0 | 3.0 | 7.5 |
| WR151 | WN4+O5V | 28–56 | 20 | 28 | 10 | 2.1 | 3.4 | 5.7 | 14.3 |
| WR133 | WN5+O9I | 34–66 | 17 | 34 | 9 | 112.4 | 158.1 | 0.0 | 0.0 |
| WR141 | WN5+O5III-V | 26–59 | 36 | 26 | 18 | 21.7 | 43.1 | 0.0 | 0.0 |
| WR155 | WN6+O9II-Ib | 30–44 | 24 | 30 | 12 | 1.6 | 2.6 | 1.5 | 3.8 |
| WR9 | WC5+O7 | > 30 | 9 | 32 | 8 | 14.3 | 15.0 | 0.1 | 0.3 |
Notes. For the selected observed WR+O binaries, the mass-range of the O star based on its spectral type and luminosity class, the adopted WR and O masses based on all available data, the estimated mass of the WR star at the end of core helium burning, the present observed period and the estimated period at the end of the core helium burning phase of the WR star, the time (in Myr) where the resulting wind-fed BH+O is observable as a X-ray binary, and finally the number of expected wind-fed BH high-mass X-ray binaries. Masses are in M⊙ and periods are in days.
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