Star Formation and Feedback: Jets, Outflows, & Explosions
John Bally, University of Colorado
Aula Seminari DAM, 7th floor, and via Zoom
Abstract: The Orion region contains the nearest sites of low- and high-mass star formation. Forming stars produce time-variable jets, winds, and outflows and in some cases, explosions which inject energy and momentum directly into molecular clouds. Outflows provide evidence for accretion bursts, N-body interactions, and in some cases protostellar mergers. I will review the remarkable explosion that occurred in Orion OMC1 behind the Orion Nebula ~550 years ago (that's when the light would have reached Earth). This event was likely powered by an N-body interaction that resulted in a stellar merger and ejection of runaway stars. Such explosions may be relatively common in dense, massive star-forming complexes. Feedback and N-body dynamics are crucial ingredients in establishing stellar masses and the IMF.