Landing page for project EM152

A double-double radio galaxy J0028+0035 consists of a pair of large-scale relic lobes straddling a pair of compact components and a coincident blazar. Our VLA images revealed that the inner double is, in fact, a triple whose central feature identified with the host galaxy has a steep spectrum. This may suggest that instead of a classical core-jet it might be either a very compact double or a diffuse single. If the core component, when resolved with the EVN, turns out to be a compact double then J0028+0035 as a whole will emerge as a very rare triple-double source. If it is a diffuse single then a transition from radio-loud to radio-quiet state might have taken place in the nucleus. However, if it turns out to be a core-jet anyway, we expect the jet to be pointed towards the southern inner lobe that appears to be a relic. With the EVN+e-MERLIN observation proposed here, we would like to check which scenario is correct. In any case, this observation would give a unique insight not only into this very peculiar object but also the recurrent jet activity in general.

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