Possible evidence for a supermassive binary black hole in 3C454.3

Context. The kinematic behaviors of thirteen superluminal components observed at 43 GHz in blazar 3C454.3 are investigated and model-fitted terms the precessing jet-nozzle scenario previously proposed. Aims. In order to search for possible precession periodic ejection 3C454.3, divided into following two groups: group-A group-B. Group-A consists six (B4, B5, K2, K3, K09, K14) group-B seven (B1, B2, B3, B6, K1, K10, K16). Methods. For each component group-B, features (trajectory, core separation, coordinates, apparent velocity versus time) were our scenario, its parameters (bulk Lorentz factor, viewing angle, velocity, Doppler factor derived compared with observations. Results. It is found that may be regarded produced by a double-jet system, consisting jet-A jet-B which ejects respectively. Both jets likely same period ∼10.5 yr (5.6 source frame) modeled time coverages ∼2 ∼1.5 periods, motion these inner-jet regions (core separation ≲0.3–0.5 mas) explained follow common trajectory respective jet-B. recurrence curved pair knots B6 K10 exhibits significant clue as periodicity. Conclusions. analysis explanation entire kinematics might possibly imply hosts supermassive binary black hole, creates relativistic pointing closely toward us small angles.