$θ^1$ Ori C as a medieval bully: a possible very recent ejection in the Trapezium

英文摘要：

We use Gaia EDR3 astrometry to propose that a dynamical interaction between the multiple system $θ^1$ Ori C and $θ^1$ Ori F ejected the latter as a walkaway star ~1100 years ago (without deceleration) or somewhat later (with a more likely deceleration included). It is unclear whether the final 3-D velocity of $θ^1$ Ori F will be large enough to escape the Orion nebula cluster.