NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-25 T20:22:51 PDT
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For refcode 1991AJ....101..362C:
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Copyright by American Astronomical Society. Reproduced by permission
1991AJ....101..362C UGC GALAXIES STRONGER THAN 25 mJy AT 4.85 GHz J. J. CONDON AND D. T. FRAYER National Radio Astronomy Observatory, Edgemont Road, Charlottesville, Virginia 22903-2475 J. J. BRODERICK Department of Physics, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061 Received 12 September 1990; revised 8 October 1990 ABSTRACT UGC galaxies in the declination band + 5^deg^<{delta}<+75^deg^ were identified by position coincidence with radio sources stronger than 25 mJy on the Green Bank 4.85 GHz sky maps. Candidate identifications were confirmed or rejected with the aid of published aperture-synthesis maps and new 4.86 GHz VLA maps having 15 or 18 arcsec resolution, resulting in a sample of 347 nearby radio galaxies plus five new quasar-galaxy pairs. The radio energy sources in UGC galaxies were classified as "starbursts" or "monsters" on the basis of their infrared-radio flux ratios, infrared spectral indices, and radio morphologies. The rms scatter in the logarithmic infrared-radio ratio q is not more than {sigma}q = 0.16 for starburst galaxies selected at 4.85 GHz. Radio spectral indices were obtained for nearly all of the UGC galaxies, and S0 galaxies account for a disproportionate share of the compact flat-spectrum ({alpha}<0.5) radio sources. The extended radio jets and lobes produced by monsters are preferentially, but not exclusively, aligned within about 30^deg^ of the optical minor axes of their host galaxies. The tendency toward minor-axis ejection appears to be independent of radio-source size and is strongest for elliptical galaxies.
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