The structure of W51

Details The structure of W51 The structure of W51

Jun 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....75..365p&link_type=abstract

Astronomy and Astrophysics, vol. 75, no. 3, June 1979, p. 365-370. NSF-supported research.

Astronomy and Astrophysics

Astronomy

22

Radial Velocity, Radiative Recombination, Radio Spectra, Thermal Emission, Astronomical Maps, Atomic Recombination, Carbon, H Alpha Line, H Ii Regions, Ionized Gases, Radio Astronomy, Radio Sources (Astronomy), Spectral Resolution

Scientific paper

The relative velocity characteristics of the components of the giant H II region, W51, which can be resolved with a 3 arcmin beam were examined by observing radio recombination lines. H166 alpha lines were observed at 12 positions with the Arecibo telescope, which has a beam width of 3.5 arcmin. These data are directly compared with H109 alpha and H137 beta measurements at 5 of these positions which were obtained with a 2.6 arcmin beam. There is evidence for a genuine clustering of H II regions in W51; the component H II regions form three spatial-velocity groups.

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