Astronomy and Astrophysics – Astronomy
Scientific paper
May 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989natur.339..286s&link_type=abstract
Nature (ISSN 0028-0836), vol. 339, May 25, 1989, p. 286-288.
Astronomy and Astrophysics
Astronomy
16
Active Galaxies, Extragalactic Radio Sources, Radio Galaxies, Relativistic Effects, Very Long Base Interferometry, Astronomical Models, Blazars, Light Speed, Quasars, Radio Jets (Astronomy), Very Large Array (Vla)
Scientific paper
From a large survey of possible one-sided extragalactic radio sources made with both MERLIN and the VLA, a class of one-sided sources are identified that are dominated by their extended emission while the lower limits on their degree of symmetry, inferred from MERLIN observations, are among the highest known. These weak-cored one-sided sources appear to be inconsistent with the 'unified scheme', which attempts to explain core-dominated sources as being the relativistically beamed counterparts of the lobe-dominated ones. Possible explanations for this class of sources are discussed, and tests to distinguish between the different alternatives are suggested.
Junor William
Muxlow Thomas W. B.
Saikia D. J.
Tzioumis Anastasios K.
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