Internal motions of HII regions and giant HII regions

Details Internal motions of HII regions and giant HII regions Internal motions of HII regions and giant HII regions

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994ap%26ss.216..253c&link_type=abstract

Astrophysics and Space Science, vol. 216, no. 1-2, p. 253-262

Astronomy and Astrophysics

Astrophysics

6

H Ii Regions, Kinematics, Magellanic Clouds, Plasma Turbulence, Stellar Winds, Supernova Remnants, Astronomical Spectroscopy, Echelle Gratings, Fabry-Perot Spectrometers, H Alpha Line, Star Formation

Scientific paper

We report new echelle observations of the kinematics of 30 HII regions in the Large Magellanic Clouds (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.

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