Origin of the Most Recently Ejected OB Runaway Star from the R136 Cluster.

The ∼60 000 solar-mass (M_{⊙}) star cluster R136 (NGC 2070) in the Tarantula Nebula in the Large Magellanic Cloud is the host of at least 55 massive stars (M≳10M_{⊙}) which move away from the cluster at projected velocities ≥27.5  km/s. The origin of the high velocities of such runaway stars have been debated since the 1960s, resulting either from dynamical ejections or from supernova explosions.

Two waves of massive stars running away from the young cluster R136.

Massive stars are predominantly born in stellar associations or clusters. Their radiation fields, stellar winds and supernovae strongly impact their local environment. In the first few million years of a cluster's life, massive stars are dynamically ejected and run away from the cluster at high speed.