| Description |
We propose observing thermal dust emission inside two wind blown bubbles identified by their PAH emission (N90 and N56 from a Churchwell et al., 2006) in all SPIRE and PACS bands. These bands sample emission from all dust grain sizes and temperatures thought to exist behind the post shocked gas. By measuring the emission across the face of the bubble and comparing with numerical simulations, we will determine how the grain size distribution changes with distance from exciting source. These results will help determine what dominant physics, sputtering or gas-dust friction, dominates grain processing within these sources. We will also measure emission from the cold, dense cloudlets proposed by Everett & Churchwell (2010) as the source of dust within these bubbles. By better characterizing these physical properties of dust grains, we will be able to better predict how dust grains affect the energetics of wind blown bubbles. |
