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Narrowband Mid-Infrared Images and Models of the H II Complex G34.3+0.2
We present mid-infrared images of the ultracompact H II region complexG34.3+0.2 taken on the IRTF through a 1.8% circular variable filterwheel at 8.0, 9.7, 11.2, 12.8, and 13.2 μm and through a 6.8% filterat 20.6 μm. Infrared emission was detected at the radio components A,C (the ``cometary'' component), and D. In addition, two new sources ofemission were found south of C at 20.6 μm we assign them names of Eand F. Infrared emission was not detected at B, and C does not have thefamous cometary shape that is observed in radio continuum emission.Photometric flux densities and source sizes are determined for A, C, andE. Radiative transfer models are then presented to match the observeddust emission for these sources. Based on the observations and models,an overview of the complex is suggested in which C is an approximatelyspherical centrally heated source that was not formed from material inthe adjacent ultracompact molecular core. C is not a blister source, andit is not colliding with the molecular core.
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