Superluminal motion of the radio core of BL Lacertae - 1980.4-1988.3

Details Superluminal motion of the radio core of BL Lacertae - 1980.4-1988.3 Superluminal motion of the radio core of BL Lacertae - 1980.4-1988.3

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...352...81m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 352, March 20, 1990, p. 81-95.

Astronomy and Astrophysics

Astronomy

80

Bl Lacertae Objects, Galactic Structure, Radio Sources (Astronomy), Linear Polarization, Relativistic Electron Beams, Shock Wave Propagation, Very Long Base Interferometry

Scientific paper

A VLBI array mapping of the compact radio source associated with BL Lacertae at 5.0 and 10.6 GHz has led to the identification of four superluminally moving components, each of which coincides with a flux and polarization outburst, as well as a nearly stationary knot which persisted during a prolonged period of quiescence. These observations are discussed in terms of relativistic beam models with propagating shocks; it is established that the observations are consistent with models with a Lorentz factor of about 4 and a viewing angle between the observer's line-of-sight and the jet axis of 19-31 deg.

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