Tuesday 13 Mar 2018[Journal Club] Massive star feedback in giant molecular cloud complexes

Tom Bending - University of Exeter

4th Floor Interaction Area 11:15-11:45

Star formation in hydrodynamical simulations typically occurs faster and more efficiently than observations suggest. The inclusion of stellar feedback in giant molecular cloud (GMC) scale simulations has a significant impact on local gas morphology and the distribution of new stars, however, it does not reduce rates and efficiencies as much as expected. Such simulations also show that much of the energy and momentum imparted to gas from feedback escapes GMCs, especially when photoionisation (and winds) have created low density regions around clusters that contain massive stars before that cluster’s first supernova event. By running numerical simulations of GMC complexes using smoothed particle hydrodynamics and including the impact of photoionisation before supernovae, I aim to learn about the wider reaching effects of massive star feedback. How does feedback drive turbulence on scales larger than GMCs? Can conditions in neighbouring GMCs be altered enough to affect star formation rates and efficiencies?

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