Ultracompact H Ii Regions

  title={Ultracompact H Ii Regions},
  author={S. A. Kurtz and Jose Franco},
We review some recent observational results on the properties of ultracompact H II regions, in particular the presence of extended continuum emission surrounding ultracompact sources and the discovery of a new class of so-called " Hypercompact " H II regions. In addition, we discuss recent attempts to probe the density structure within UC H II regions using the technique of spectral index analysis. 

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Instituto de Astronomía, UNAM-Morelia, Apdo. Postal 3-72

  • S Kurtz
  • C.P

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