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We have observed the HII region RCW175 with the 64m Parkes telescope at8.4GHz and 13.5GHz in total intensity, and at 21.5GHz in both total intensityand polarization. High angular resolution, high sensitivity, and polarizationcapability enable us to perform a detailed study of the different constituentsof the HII region. For the first time, we resolve three distinct regions atmicrowave frequencies, two of which are part of the same annular diffusestructure. Our observations enable us to confirm the presence of anomalousmicrowave emission (AME) from RCW175. Fitting the integrated flux densityacross the entire region with the currently available spinning dust models,using physically motivated assumptions, indicates the presence of at least twospinning dust components: a warm component with a relatively large hydrogennumber density n_H=26.3/cm^3 and a cold component with a hydrogen numberdensity of n_H=150/cm^3. The present study is an example highlighting thepotential of using high angular-resolution microwave data to break modelparameter degeneracies. Thanks to our spectral coverage and angular resolution,we have been able to derive one of the first AME maps, at 13.5GHz, showingclear evidence that the bulk of the AME arises in particular from one of thesource components, with some additional contribution from the diffusestructure. A cross-correlation analysis with thermal dust emission has shown ahigh degree of correlation with one of the regions within RCW175. In the centerof RCW175, we find an average polarized emission at 21.5GHz of2.2\pm0.2(rand.)\pm0.3(sys.)% of the total emission, where we have includedboth systematic and statistical uncertainties at 68% CL. This polarizedemission could be due to sub-dominant synchrotron emission from the region andis thus consistent with very faint or non-polarized emission associated withAME.

New radio observations of anomalous microwave emission in the HII region RCW175