Other
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986azh....63..874k&link_type=abstract
Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 63, Sept.-Oct. 1986, p. 874-883. In Russian.
Other
Astronomical Models, Extragalactic Radio Sources, Plasma Interactions, Relativistic Plasmas, Very Long Base Interferometry, Light Speed, Plasma Jets
Scientific paper
The basic properties of 'superluminal' VLBI components in compact variable extragalactic radio sources are presented. A version of the 'screen' model is considered whereby 'superluminal' components move with the phase velocities of the region of interaction between precessed relativistic plasma jets and heterogeneities of the circumnuclear medium. Within the framework of the present model, the effect of 'superluminal' motions should always be accompanied, in a wide range of wave-lengths, by emission variability caused by the entrance of separate gas structures into precession 'beams'. It is concluded that 'superluminal' motions can be observed in ranges other than the radio range and that emission variability appears in the circumnuclear region.
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