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Astrophysics Colloquium

Protostellar Explosions, IR Transients, Ejected Stars, and the IMF
Presented by John Bally
Center for Astrophysics and Space Astronomy, University of Colorado Boulder

Thursday, July 11, 2019
11:00 A.M. in 169-336

Abstract
A 10^48 erg explosion occurred in Orion about 550 years ago. This event was caused by the decay of a non-hierarchical multiple system that ejected 3 stars and ∼10 M_Sun of gas from the OMC1 star-forming cloud core. The slowest moving and most massive star may be the remnant of a protostellar merger. Other star forming regions show fossil evidence for explosions within the last 10,000 years. N-body interactions and stellar ejections may play an important role in terminating accretion, setting the final masses of stars, and establishing the Initial Mass Function (IMF).

JPL Contact: Paul Goldsmith (3-0518)


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