Emission with Arcminute Resolution Brian Dennison, John H. Simonetti, Gregory A. Topasna, PASA, 15 (1), 147
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Early Scientific Results
We have carried out deep H
observations of fields in which other groups have observed apparent anisotropies in the cosmic microwave background. Our results rule out any significant contribution from foreground galactic free-free emission (Simonetti, Dennison & Topasna 1996).
We have also discovered a supershell inflated by stellar winds from young stars associated with the HII region W4. This structure was previously thought to be an open galactic chimney. Our H image reveals a large, elongated ionized shell which appears to close at a galactic latitude of 7
above the W4 HII region. Stellar winds from the very young star cluster OCl352 have evidently produced this superbubble. The HII shell is maintained by ionizing radiation from the star cluster. For further details see Dennison, Topasna & Simonetti (1997).
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