A VLA survey of optically visible galactic H II regions

Details A VLA survey of optically visible galactic H II regions A VLA survey of optically visible galactic H II regions

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apjs...86..475f&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 86, no. 2, p. 475-497.

Astronomy and Astrophysics

Astronomy

58

H Ii Regions, Radio Astronomy, Very Large Array (Vla), Flux Density, Morphology, Northern Hemisphere

Scientific paper

Radio continuum observations of 109 optically visible Galactic H II regions were obtained with the Very Large Array. Contour plots of the images of those that were well resolved and tables of radio continuum flux density for all detected objects are presented. The measured total flux densities matched well with the results of single-dish surveys, and thus it is expected that the problem of missing 'zero-spacing flux' has not contributed greatly to the morphologies seen in the resulting images. The relative numbers of objects of each morphological type were very similar to the numbers seen in the survey of ultracompact H II regions by Wood and Churchwell (1989) even though the objects in this new survey are on average 50 times larger (in radius) and therefore presumably more evolved.

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