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Published 1984 | Published
Book Section - Chapter Open

VLBI Survey of a Complete Sample of Active Nuclei and Quasars


We have conducted a VLBI survey of a complete, flux-density limited sample of 65 extragalactic radio sources, selected at 5 GHz. We have made hybrid maps at 5 GHz of all of the sources accessible to the Mark-II system. The sources can be divided provisionally into a number of classes with different properties: central components of extended double sources, steep-spectrum compact sources, very compact (almost unresolved) sources, asymmetric sources (sometimes called "core-jet" sources), and "compact double" sources. It is not yet clear whether any of these classes is physically distinct from the others, or whether there is a continuous range of properties.

Additional Information

© 1984 by the IAU. VLBI research at the Owens Valley Radio Observatory is supported by NSF grant AST 82-10259. We are very grateful to the U.S. Network, the Max-Planck Institut für Radioastronomie, and the staffs of the observatories, for making the observations possible.

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August 19, 2023
January 14, 2024