Making BEASTies: dynamical formation of planetary systems around massive stars

Exoplanets display incredible diversity, from planetary system architectures around Sun-like stars that are very different to our Solar System, planets orbiting post-main sequence or stellar remnants. Recently the B-star Exoplanet Abundance STudy (BEAST) reported discovery of at least two super-Jovian massive in Sco Cen OB association. Whilst such do have Keplerian discs, it is hard envisage gas giant being able form hostile environments. We use N-body simulations star-forming regions show these systems can instead capture a free-floating planet, direct theft planet one star another, more star. find this occurs on average once first 10Myr an association's evolution, and semimajor axes hitherto confirmed BEAST (290 556au) consistent with than theft. Our results lend further credence notion distant (>100au) orbits may not be their parent