A complete sample of Northern Hemisphere active galactic nuclei - Differences in flux and spectra at high radio frequencies

Details A complete sample of Northern Hemisphere active galactic nuclei - Differences in flux and spectra at high radio frequencies A complete sample of Northern Hemisphere active galactic nuclei - Differences in flux and spectra at high radio frequencies

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....104.1009w&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 104, no. 3, Sept. 1992, p. 1009-1017.

Astronomy and Astrophysics

Astronomy

30

Active Galactic Nuclei, Blazars, Extragalactic Radio Sources, Quasars, Radio Frequencies, Radio Galaxies, Active Galaxies, Bl Lacertae Objects, Northern Hemisphere, Radio Telescopes

Scientific paper

Two-epoch 22 and 37 GHz flux measurements of a complete 1 Jy sample of flat-spectrum extragalactic radio sources are presented. The spectral and variability properties of quasars and blazars in our sample are similar. Radio galaxies, which have steeper cm-to-mm spectra, are the only sources which can be identified solely on the basis of their radio continuum properties. Surprisingly, among the flat-spectrum sources the BL Lacs and low polarization quasars with the steepest spectra seem to be the most variable ones. The implications of these results for orientation-dependent unified models for active galaxies are discussed.

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