Close-up of a galaxy nucleus
June 25, 2018
In the centre of the galaxy OJ 287, there is one active, super-mass-rich black hole. An international research team led by Silke Britzen of the Max Planck Institute for Radio Astronomy has now discovered that the active nucleus of this galaxy generates a jet that staggers like a spinning top on a time jet on a timescale of about 22 years. With this movement called ‘precession’, the fluctuation of the radiation of OJ 287 can be explained. The discovery thus provides the key to understanding the variability in active galaxy nuclei.