Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90.1446j&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 90, Aug. 1985, p. 1446-1448.
Astronomy and Astrophysics
Astronomy
2
Radio Jets (Astronomy), Very Long Base Interferometry, Brightness Distribution, Line Of Sight, Nonthermal Radiation, Orientation, Relativistic Velocity
Scientific paper
The compact, nonthermal radio sources which are studied with very-long-baseline interferometry (VLBI) are often found to have a linear structure with a bright, nearly unresolved component at one end. This asymmetric structure is usually referred to as a 'core-jet' morphology. In some sources there are bright bumps or knots - regions of enhanced radio emission - along the 'jets', while other sources have relatively smooth, featureless jets. This paper reports the result of a study of the differences between compact radio sources with bumpy and smooth jets. It is concluded that most, if not all, of the difference in jet smoothness can be attributed to the orientation of the radio axis with respect to the line of sight. Thus, the VLBI observations do not necessarily imply that there are intrinsic differences in the smoothness of parsec-scale radio jets.
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