Internal motions of H II regions and giant H II regions.

Details Internal motions of H II regions and giant H II regions. Internal motions of H II regions and giant H II regions.

Jun 1994

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

Astrophysics and Space Science, Vol. 216, Nos. 1 - 2, p. 253 - 262

Astronomy and Astrophysics

Astrophysics

H Ii Regions: Magellanic Clouds, H Ii Regions: Stellar Winds, H Ii Regions: Supernova Remnants, H Ii Regions: Kinematics, H Ii Regions: Turbulence

Scientific paper

The authors report new echelle observations of the kinematics of 30 H II regions in the LMC, including the 30 Dor giant H II region. All of the H II 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. The authors use their 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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