Anomalous Emission from HII regions
Abstract
Spinning dust appears to be the best explanation for the anomalous emission that has been observed at 10-60 GHz. One of the best examples of spinning dust comes from a HII region in the Perseus molecular cloud. Observations of other HII regions also show tentative evidence for excess emission at frequencies 30 GHz, although at lower emissivity levels. A new detection of excess emission at 31 GHz in the HII region RCW175 has been made. The most plausible explanation again comes from spinning dust. HII regions are a good place to look for spinning dust as long as accurate radio data spanning the 5-100 GHz range is available.
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