θ1 Ori C as a medieval bully: a possible very recent ejection in the Trapezium

Abstract

We use Gaia EDR3 astrometry to propose that a dynamical interaction between the multiple system θ1 Ori C and θ1 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 θ1 Ori F will be large enough to escape the Orion nebula cluster.

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