Internal motions of HII regions and giant HII regions

You Hua Chu, Robert C. Kennicutt

Research output: Contribution to journalArticlepeer-review


We report new echelle observations of the kinematics of 30 HII regions in the LMC, including the 30 Doradus giant HII region. All of the HII regions possess supersonic velocity dispersions, which can be attributed to a combination of turbulent motions and discrete velocity splitting produced by stellar winds and/or embedded supernova remnants (SNRs). The core of 30 Dor is unique, with a complex velocity structure that parallels its chaotic optical morphology. We use our calibrated echelle data to measure the physical properties and energetic requirements of these velocity structures. The most spectacular structures in 30 Dor are several fast expanding shells, which appear to be produced at least partially by SNRs.

Original languageEnglish (US)
Pages (from-to)253-262
Number of pages10
JournalAstrophysics and Space Science
Issue number1-2
StatePublished - Jun 1994


  • HII regions
  • giant HII regions
  • kinematics
  • stellar winds
  • supernova remnants

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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