EB064
Does Cygnus A harbor a binary black hole?
Recently a new radio source was detected with the VLA in Cygnus A at a distance of about 460 parsec from the centre. The source is not directly associated with the VLBI core and the jets, but coincides with a compact optical/near-IR source. We detected the new source on sub-parsec scales with EVN observations at 1.3cm in March 2017. It appears compact and more luminous than any known radio super nova. The most plausible origin of the emission is a recent onset of activity from a so far not detected secondary black hole in Cygnus A. With this proposal we aim to start an EVN monitoring of the further evolution of the source at 1.3cm. A detailed study of the flux density evolution, structural changes and linear polarisation properties will enable us to better understand the nature of this new object.
Observation pages at the EVN archive:
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