Landing page for project GL046

The powerful radio source 3C205, at a redshift of 1.534, is a unique laboratory for study of relativistic jet propagation and radio lobe generation, via deceleration and termination the jet. A prior 18cm VLBA study of the extraordinarily compact southern hotspot of this source, in 1995, revealed a remarkable jet deflection structure with a highly ordered magnetic field tracking a sharp bend, indicating collision with a dense circumgalactic object of unknown type. Major advances in global VLBI capabilities since then allow ~40 times more sensitivity, higher angular resolution, and wide spanned bandwidths yielding accurate measurement of spectra and Faraday effects. A long track using EVN + VLBA stations, GBT and phased VLA are proposed at L-band, yielding high quality imagery of both the quasar core and the hotspot complex ~8 arcsec distant. The improved imaging will allow tracing of the complex polarized structures prior to and following the main jet interaction region. FR data will constrain plasma properties and sound speeds in the interacting jet flow, and may probe the properties of the deflecting medium. Spectral data can constrain the nature and sites of active electron acceleration.

This data is part of the archive of VLBI data maintained by JIVE on behalf of the EVN, a network of radio telescopes located primarily in Europe and Asia, with additional antennas in South Africa. The EVN archive itself has the DOI https://doi.org/10.17616/R3Z197