THE QUASAR-3C395 REVISITED - NEW VLBI OBSERVATIONS AND NUMERICAL SIMULATIONS

We present the results of simultaneous VLBI observations of the quasar 3C395 at 2.3 and 8.4 GHz. Our maps show two well defined components ( A and B) together with a weaker component in between (C2). The positio n of component C2 is compatible with the position of a component obser ved at epoch 1986.9 (component Cl). We can interpret this positional c oincidence i) assuming that component C2 and component C1 are just the same one, and hence C2 is stationary, or ii) considering that compone nt C2 has travelled from the core to its current position, which now i s coincident with the position of component C1 observed in 1986.9. The latter interpretation is supported by the total flux density evolutio n of 3C395. Based on this idea, we also present a model for 3C395 and numerical simulations of the time evolution of the emission of the com pact structure at 2.3, 4.9 and 8.4 GHz which allow us to construct sim ulated maps of 3C395. The model and numerical simulations also provide a quantitative positional shift for the opaque core at 2.3 GHz with r espect to 8.4 GHz which helps us to construct a spectral-index map of the source. Finally, our re-analysis of intermediate resolution VLBI o bservations at 0.6 GHz contribute to clarify the behavior of the jet b eyond the cm-VLBI structure.