Fig. 6.

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Results of the KaVA 43 GHz monitoring. (a) Zoom-in view of the upstream region of the KaVA 43 GHz image in Fig. 1. The isolated jet feature at ≈5 mas is embedded in the bottom right of the plot. The four knots identified via the modelfit analysis are marked on the map. (b) Flux density and the displacements of the knots as functions of time. Exponential fits to the flux density data and linear fits to the motions are shown as continuous lines. (c) Relativistic beaming factor δ3 − α as a function of Γβ and assuming a spectral index of α = −0.5. We show our data along three theoretical lines corresponding to different values of θv.
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