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2001MNRAS.328..873G - Mon. Not. R. Astron. Soc., 328, 873-881 (2001/December-2)
Changes in the trajectory of the radio jet in 0735+178.
GOMEZ J.L., GUIRADO J.C., AGUDO I., MARSCHER A.P., ALBERDI A., MARCAIDE J.M. and GABUZDA D.C.
Abstract (from CDS):
Identification of components across epochs, since the earliest VLBI observations of this source in 1979.2, proves difficult due to the sometimes large time gaps between observations. One possible identification suggests the existence of superluminal components following non-ballistic trajectories with velocities up to 11.6±0.6 h^-1_65c. However, in images obtained after mid-1995, components show a remarkable tendency to cluster near several jet positions, suggesting a different scenario in which components have remained nearly stationary in time, at least since mid-1995. Comparison with the earlier published data, covering more than 19 years of observations, suggests a striking qualitative change in the jet trajectory sometime between mid-1992 and mid-1995, with the twisted jet structure with stationary components becoming apparent only at the later epochs. This would require a re-evaluation of the physical parameters estimated for 0735+178, such as the observing viewing angle, the plasma bulk Lorentz factor, and those deduced from these.
Abstract Copyright: The Royal Astronomical Society
Journal keyword(s): techniques: interferometric - galaxies: active - BL Lacertae objects: individual: 0735+178 - galaxies: jets - radio continuum: galaxies
Simbad objects: 5
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