Ultracompact HII Regions

2001/11/17 by S. Kurtz, Stan Kurtz, Kurtz, Stan +3 · 1 citation
Physics and Astronomy · #Astrophysics and Star Formation Studies #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #astro-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/0111351

7 pages, Latex, special macros: rmaa.cls macros available at http://www.astrosmo.unam.mx/~w.henney/rmaa/ Revista Mexicana de Astronomia & Astrofisica (Serie de Conf.) Presented at the symposium Ionized Gaseous Nebulae, Mexico City

arxiv created 2001/11/20 · arxiv updated 2009/12/01

Abstract

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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