The radio appearance of compact H II regions - VLA observations of G31.28 + 0.06, G33.92 + 0.11, and G34.25 + 0.14

Details The radio appearance of compact H II regions - VLA observations of G31.28 + 0.06, G33.92 + 0.11, and G34.25 + 0.14 The radio appearance of compact H II regions - VLA observations of G31.28 + 0.06, G33.92 + 0.11, and G34.25 + 0.14

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....103..234f&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 103, Jan. 1992, p. 234-242.

Astronomy and Astrophysics

Astronomy

28

Emission Spectra, H Ii Regions, Interstellar Masers, Molecular Clouds, Very Large Array (Vla), Continuous Radiation, Hydroxyl Emission, Water Masers

Scientific paper

Results are presented from multifrequency-VLA continuum and spectral-line observations for three compact H II regions: G31.28 + 0.06, G33.92 + 0.11, and G34.25 + 0.14. It is found that the continuum images of G31.28 + 0.06 at 20 and 3.6 cm show a cometary morphology, although the combination of resolution and sensitivity of the 6-cm image shows that this region is actually a shell source where the continuum emission from one part of the shell dominates the emission from the rest of the shell. The high-resolution 20-cm continuum emission from G33.92 + 0.11 also shows a shell source whose continuum emission is dominated by one side of the shell. The image of 34.25 + 0.14 shows a ring of emission of a diameter equal to about 1 arcmin. This structure appears to be a shell which is 75 percent complete.

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