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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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