Double—double radio galaxies: remnants of merged supermassive binary black holes

  title={Double—double radio galaxies: remnants of merged supermassive binary black holes},
  author={F. K. Liu and Xue-Bing Wu and Sweden Peking University and China Institute of Computing Technology and Sweden Beijing Normal University and China.},
  journal={Monthly Notices of the Royal Astronomical Society},
The activity of active galaxies may be triggered by the merging of galaxies, and present-day galaxies are probably the product of successive minor mergers. The frequent galactic mergers at high redshift imply that active galaxies harbour supermassive unequal-mass binary black holes at their centre at least once during their lifetime. The secondary black hole interacts and becomes coplanar with the accretion disc around the primary, inwardly spiralling toward their mass centre owing to the loss… Expand

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