Study on the Jet Trajectory of the BL Lac Object 0735+178

BL Lac objects 0735178 jet in mid - 1992 presents a linear trajectory , however, was observed in the mid - 1995 to mid - 1998 jet has two obvious ninety bending away from the nuclear 2mas distance structure , and on the jet apparent superluminal motion . In this paper, a non - ballistic model better fit this interesting phenomenon , and by the model jet trajectory from 2000 to 2002 , will re- transformed into linear , of this 15.335GHZ and 15.365GHZ band the observational data are in good agreement . This work is mainly focused on the following aspects : First of all, the second chapter discusses the formation of active galactic nuclei jet as well as the radiation mechanism . Form a part of the jet stream , the main jet collimation and acceleration mechanism ; part of the jet radiation mechanism is introduced jet two important mechanisms of radiation - synchrotron radiation and inverse Compton scattering . Second, third chapter discusses the precession of jets in active galactic nuclei and apparent superluminal motion . This chapter first jet disk precession mechanism and the Lense-Thirring precession mechanism be briefly introduced ; apparent superluminal motion of active galactic nuclei jet stream hot research topic in This article detailed discussion of both ballistic and non - ballistic model and the two models do a comparison. Finally, the focus of this article , we use non - ballistic model fitted well with the changes in the BL Lac objects 0735178 jet trajectory and predict the trajectory of the jet in the future on the basis of non - ballistic model change , these need to be further observations to test .