VFTS. B-type stars classification and RV

Radial velocities are provided for 307 apparently single stars, and for 99 targets with radial-velocity variations which are consistent with them being spectroscopic binaries. We investigate the spatial distribution of the radial velocities across the 30 Dor region, and use the results to identify candidate runaway stars.

Excluding potential runaways and members of two older clusters in the survey region (SL639 and Hodge301), we determine a systemic velocity for 30 Dor of 271.6+/-12.2km/s from 273 presumed single stars. Employing a 3{sigma} criterion we identify nine candidate runaway stars (2.9% of the single stars with radial-velocity estimates). The projected rotational velocities of the candidate runaways appear to be significantly different to those of the full B-type sample, with a strong preference for either large (>=345km/s) or small (<=65km/s) rotational velocities.