A complete sample of double-lobed radio quasars for VLBI tests of source models - Definition and statistics

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Astronomical Catalogs, Extragalactic Radio Sources, Quasars, Very Long Base Interferometry, Astronomical Models, Data Sampling, Flow Velocity, Galactic Nuclei, Red Shift

Scientific paper

A complete, flux-density-limited sample of double-lobed radio quasars is defined, with nuclei bright enough to be mapped with the Mark III VLBI system. It is shown that the statistics of linear size, nuclear strength, and curvature are consistent with the assumption of random source orientations and simple relativistic beaming in the nuclei. However, these statistics are also consistent with the effects of interaction between the beams and the surrounding medium. The distribution of jet velocities in the nuclei, as measured with VLBI, will provide a powerful test of physical theories of extragalactic radio sources.

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