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STScI Webcast

2016 Fall Science Colloquia

Feedback from Massive Stars: Implications for the Evolution of Galaxies and the Inter-Galactic Medium

Presented by: Tim Heckman (Johns Hopkins University)
Category: Science Colloquia   Duration: 1 hour   Broadcast date: September 07, 2016
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I will begin by summarizing why global outflows driven from intensely star-forming galaxies are believed to play a significant role in the evolution of galaxies and the IGM. I will then review the physical mechanisms believed to be responsible for driving these outflows, before giving a “guided tour” of M 82 (the prototypical starburst-driven outflow). I will summarize how the basic properties of outflows are measured, describe how these properties scale with those of the galaxy driving the outflow, and compare these relations to expectations from simple models and with the “sub-grid” prescriptions used in numerical simulations of galaxy. evolution. Finally, I will circle back to discuss the implications of these outflows, based on our current understanding.