Table 1.
Properties of the candidate runaway O2 stars.
| VFTS 16 | VFTS 72 | |
|---|---|---|
| Spectral Typea | O2 III | O2 III-V(n)((f*)) |
| Teffb (K) |  |
54 000 ± 1500 |
| Current Massb (M⊙) |  |
 |
| Ageb (Myr) | 0.7±0.1 |  |
| vsinic (km s−1) | 112±30 | 185±30 |
| vLOSd (km s−1) | 189.2±1.2 | 273.4±1.9 |
| Gaia Source id | 4657690620070706432 | 4657698454092124416 |
| rel. pmRA (mas yr−1) | −0.336 ± 0.046 | −0.372 ± 0.050 |
| rel. pmDec (mas yr−1) | −0.038 ± 0.045 | +0.125 ± 0.061 |
| PApm | −96° ± 8 | −71 °±8 |
| PAR136 | −99° | −51° |
| dR136 (arcsec) | 506 | 370 |
| rel. pm (mas yr−1) | 0.338 ± 0.048 | 0.392 ± 0.062 |
| Tangential speed (km s−1)e | 80 ± 11 | 93 ± 15 |
| 3D speedf (km s−1) | 112 ± 8 | 93 ± 15 |
| tR136 (Myr) | 1.50 ± 0.21 | 0.94 ± 0.15 |
Notes. Relevant stellar parameters in the upper section of the table are from the VFTS as indicated, while in the lower section we give the Gaia source identifier, relative proper motion components, position angle of proper motion (PApm), distance in projection to R136 (dR136) in arcsec, and position angle (PAR136) of source with respect to R136 (east of north) in degrees, and time of flight tR136 from R136, calculated simply as dR136/(rel. pm).
Schneider et al. (2018) but see the Sect. 3,
we adopt 267.7 km s−1 as the LOS velocity of R136 from Hénault-Brunet et al. (2012).
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