Superluminal Motion of Gamma-Ray Blazars

Details Superluminal Motion of Gamma-Ray Blazars Superluminal Motion of Gamma-Ray Blazars

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aspc..299..111j&link_type=abstract

High Energy Blazar Astronomy, ASP Conference Proceedings, Vol. 299, held 17-21 June 2002 at Tuorla Observatory, Piikkio, Finland

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We have completed a program of monitoring of a sample of γ-ray blazars with the VLBA at 22 and 43 GHz. Analysis of the data allows us to conclude that the population of bright γ-ray blazars can be classified as highly superluminal, with apparent speeds as high as ˜40c. However, many of the blazars exhibit a wide range of apparent speeds from ˜4c to ˜20c in the same source. Comparison of brightness and polarization parameters with the jet velocities of moving components does not show significant correlation between these parameters. Intensive multifrequency VLBI monitoring is needed to reveal any patterns that might exist in the distribution of apparent speeds observed in the same object.

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