Table 2
Derived properties of the X1908+075 donor star.
| Parameter | Obtained value |
|
|
|
| T ∗ |  kK |
|
 kK |
| log L/L⊙ a | 4.81 ± 0.25 |
| E B − V b | 5.7 ± 0.1 |
| d c | 4.85 ± 0.50 kpc |
| ν∞ | 500 ± 100 km s-1 |
| R ∗ | 16 R⊙ |
| log geff | 3.0 ± 0.2 |
| log g | 3.2 ± 0.2 |
| M spec | 15 ± 6 M⊙ |
| Ṁ | 10-6.55 M⊙/yr |
| D d | 10 |
| νdop | 20 km s-1 |
| νrot | 100 ± 50 km s-1 |
| M V | −5.29 |
| X H e | 0.735 |
| X He e | 0.256 |
| X C e | 2.2 × 10-3 |
| X N e | 6.1 × 10-4 |
| X O e | 5.3 × 10-3 |
| X Fe e | 1.1 × 10-3 |
| log Q0 f | 47.1 s-1 |
Notes.
Obtained via SED fitting, using the reddening law from Fitzpatrick (1999).
Distance inferred from consistent reddening fit and extinction curve shown in Fig. 4.
Maximum value used in a depth-dependent approach, starting at the sonic point and increasing outwards.
Solar abundances, adopted from Asplund et al. (2009).
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