We discuss preliminary results of an 11.7 μm imaging survey of ultracompact H II regions from the Wood and Churchwell radio survey. We find that that the morphologies of ionized gas and warm dust are often significantly different, indicating that an H II region classification scheme should be based on more than radio data.
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Hayward, T.L., Miles, J.W., Houck, J.R. et al. Mid-infrared imaging of ultracompact H II regions. Exp Astron 3, 159–160 (1994). https://doi.org/10.1007/BF00430147
- H II regions