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Paper: Dust in Wind-Blown Bubbles
Volume: 438, The Dynamic Interstellar Medium: A Celebration of the Canadian Galactic Plane Survey
Page: 69
Authors: Everett, J.; Churchwell, E.
Abstract: Observational evidence for dust within the wind-blown bubble ‘N49’ was reported by Churchwell, et al. (2006) and Watson, et al. (2008). These data lead us to ask (a) if a simple model of dust emission from the wind-blown bubble can indeed match the observations, (b) if dust can survive within the hot, post-shocked gas, and (c) what role dust may play in the evolution of this and other wind-blown bubbles. Here, we summarize our answers to those questions. We find that dust emission can match the observed 24 μm emission, that small dust grains are quickly sputtered and all dust grains driven outwards by gas-dust friction in ∼104 yrs, that dust may satisfy the observations if resupplied by ‘cloudlets’ within the bubble, and that dust will strongly affect the cooling in the post-shock region. We finish by pointing to further work necessary to refine, test and constrain this model.
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