Multi-frequency VLBI observations of the BL Lac 0735+178

Details Multi-frequency VLBI observations of the BL Lac 0735+178 Multi-frequency VLBI observations of the BL Lac 0735+178

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002evn..conf..115a&link_type=abstract

6th European VLBI Network Symposium on New Developments in VLBI Science and Technology, held in Bonn, June 25th-28th 2002, proce

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a new set of VLBI observations of the BL Lac object 0735+178 at frequencies ranging from 5 to 43 GHz, covering a total of seven epochs from 26 March 1996 to 20 May 2000. This source presents one of the most pronounced curvatures observed in jets of AGN, with two sharp apparent bends of about 90° within the inner 2 milliarcseconds from the core. With the new information we study the structural evolution of the jet in this source since our first VLBI observations in 1996. We discuss a scenario in which the plasma of the jet is traveling inside a slowly moving curved funnel. Compilation of all available VLBI data allows us to argue about the reason for a large outburst in this source in 1989 (Aller et al. cite{All99}).

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