J2102+6015: a potential distant multimessenger?

Abstract

We present and briefly discuss results of several studies of the source J2102+6015 with tentatively defined redshift z=4:575 which demonstrates unusual properties in imaging and astrometric VLBI observations. Its properties might be considered as indications on the supermassive black hole binary which can be considered as a so far rare example of a high-redshift source of known electromagnetic and, possibly, predictable gravitational wave emissions.

To be published in the Proceedings of the IAU Symp. No. 375 "The multimessenger chakra of blazar jets", Kathmandu, Nepal, December 2022