2002ApJ...577...69J

We present Very Long Baseline Array observations of the radio source J1625+4134 at 22 and 15 GHz and analyze them in concurrence with other existing VLBI data on this source. The high-resolution images at 15 and 22 GHz show a short and bending jet, which differs by about 270° in position angle with the northern jet detected at lower frequencies. The new high-resolution data, combined with the data available in the literature, allow us to estimate the spectral index of the components and to identify one of the compact components as the VLBI core based on its flat spectrum between 5 and 22 GHz. Relative to this core component, the jet appears to be bidirectional. The proper-motion measurement of the component C2 and the estimate of the Doppler boosting factor suggest that the orientation of the jet is close to the line of sight. The projection effect of an intrinsically sharply bending jet within a few milliarcseconds from the core or the erratic change in the nozzle direction of the jet may account for the uncommon bidirectional structure of the jet in J1625+4134.