Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....92..787f&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 92, Oct. 1986, p. 787-804.
Astronomy and Astrophysics
Astronomy
35
Astronomical Catalogs, Milky Way Galaxy, Radio Astronomy, Centimeter Waves, H Ii Regions, Spectrum Analysis, Visibility
Scientific paper
The VLA has been used to make a "snapshot" survey of all radio continuum sources stronger than 0.3 Jy at 21 cm, smaller than 2 arcmin, and in the area in the sky defined by l = 93° to 163°, b = -4° to +4°. These objects were observed at 6 cm with a resolution of 4 arcsec and a sensitivity of 1 mJy. A second set of observations were carried out to determine the spectral indices of all objects not resolved in the 6 cm survey. These objects were observed at a wavelength of 2 cm with resolution and sensitivity similar to the 6 cm survey. The purpose of this study was to identify objects within the disk of the outer parts of our galaxy. It is shown that the current lists of identified H II regions in this area are better than ≡70% complete for H II regions in the Perseus arm or closer. The only supernova remnants remaining to be discovered in this field are either extremely young, and therefore possibly radio quiet, or they are among those objects too extended to be observed at the VLA in this survey (i.e., greater than 2 arcmin in diameter).
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