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

TL;DR

This paper uses Gaia EDR3 data to suggest that a recent dynamical interaction ejected a star from the Orion nebula cluster, providing insights into stellar dynamics and ejection mechanisms.

Contribution

It presents evidence for a recent stellar ejection caused by dynamical interactions within a multiple star system using precise astrometric data.

Findings

Star $ heta^1$ Ori F was ejected approximately 1100 years ago.

The ejection velocity may be sufficient for the star to escape the cluster.

The ejection involved a complex dynamical interaction with $ heta^1$ Ori C.

Abstract

We use Gaia EDR3 astrometry to propose that a dynamical interaction between the multiple system $\theta^1$ Ori C and $\theta^1$ 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 $\theta^1$ Ori F will be large enough to escape the Orion nebula cluster.