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Ultracompact HII Regions

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arxiv astro-ph/0111351 v2 pith:7OORHGW5 submitted 2001-11-17 astro-ph

Stan Kurtz , Jose Franco (Instituto de Astronomia , UNAM , Mexico) This is my paper · ORCID
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keywords regionsultracompactrecentadditionanalysisattemptsclasscontinuum
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We review some recent observational results on the properties of ultracompact HII regions, in particular the presence of extended continuum emission surrounding ultracompact sources and the discovery of a new class of so-called ``Hypercompact'' HII regions. In addition, we discuss recent attempts to probe the density structure within UC HII regions using the technique of spectral index analysis.

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