SPH Simulations of Accretion Flows onto the Supermassive Binary Black   Holes from the Circumbinary Disks
  We investigate the accretion flows onto the supermassive binary black holes (SMBBHs) from the circumbinary disk with the equal mass, eccentric binary on the subparsec scale, using Smoothed Particle Hydrodynamics (SPH) code. We find that the material can be supplied from circumbinary disk, which leads to the formation of two accretion disks around the SMBBHs. The mass accretion rates significantly modulate with the binary orbital motion. These could provide the observable diagnosis of the existence of the supermassive binary black holes (e.g. OJ287) on the subparsec scale in merged galactic nuclei. 
Kimitake Hayasaki (YITP), Shin Mineshige (YITP) and Hiroshi Sudou   (Gifu University)