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Paper: Molecular Cloud Disruption and Chemical Enrichment of the ISM Caused by Massive Star Feedback
Volume: 453, Advances in Computational Astrophysics: Methods, Tools, and Outcome
Page: 25
Authors: Fierlinger, K. M.; Burkert, A.; Diehl, R.; Dobbs, C.; Hartmann, D. H.; Krause, M.; Ntormousi, E.; Voss, R.
Abstract: Realistically implementing stellar feedback is essential in numerical simulations, from the scales of individual molecular clouds to galaxy formation. In this work we test the effect of the Voss et al. (2009, 2010) feedback models on homogeneous GMCs, turbulent GMCs, as well as irregularly-structured GMCs. Our simulations also model the enrichment of the ISM with the radioactive trace element 26Al. In all our calculations, a superbubble is formed after break-out from the GMC, and then the massive-star outputs rather rapidly disrupt the molecular cloud. The feedback is most disruptive for a homogeneous molecular cloud, whereas the clouds with an irregular density structure have longer lifetimes, since more of the energy from the feedback is channeled into low density surroundings. We find that for a structured cloud, the stellar feedback naturally reproduces cavities with asymmetric morphologies, similar to the Orion-Eridanus bubble.
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