EPoS Contribution
EPoS Contribution
Conference Summary

John Bally
University of Colorado, Boulder, CO, USA
The conference summary will include the presentation of our results on explosive and orientation-variable outflows as evidence for complex stellar interactions in massive cluster-forming environments.

We have been using the Gemini North 8m telescope and the laser guide star + Altair AO system to image the OMC1 BN/KL outflow in the near-IR lines of [FeII], H2. We have found evidnece that this explosive outflow was triggered by the dynamical decay of a non-hierarchical multiple system of massive star whcih ejected the BN Object, radio source I, and infrared source n. Such dynamically ejected massive stars and assocaited outflows may be relatively common in massive star forming clusters. I will show evidence for a pulsed, precessing jet emerging from Cepheus A where the circumstellar disk of a moderate-mass star may have assisted in the capture of a sibling into an eccentric, non-coplanar orbit. These results illustrate some of the complexities of clustered star birth and show that dynamical interactions are likely to be common in massive cluster-forming environments.