Wolf-Rayet and O Star Runaway Populations from Supernovae

We present numerical simulations of the runaway fractions expected amongst O and Wolf—Rayet star populations resulting from stars ejected from binaries by the supernova of the companion. Observationally, the runaway fraction for both types of star is similar, prompting the explanation that close dynamical interactions are the main cause of these high-velocity stars. We show that, provided that the...