X. Y. Hong, D. R. Jiang, L. I. Gurvits, M. A. Garrett, R. T. Schilizzi, R. D. Nan
Abstract
The blazar 1156+295 was observed by VLBA and EVN + MERLIN at 5 GHz in June 1996 and February 1997 respectively. The results show that the jet of the source has structural oscillations on the milliarcsecond scale and turns through a large angle to the direction of the arcsecond-scale extension. A helical jet model can explain most of the observed properties of the radio structure in 1156+295.