Establish a direct correlation between jet and primary-spin precession periods

Establish a direct correlation between the precession period of the large-scale jet axis and the precession period of the primary black hole’s spin in precessing small-mass-ratio supermassive black hole binaries.

Background

The simulations show that the orbital motion of the primary black hole, its tilted inner accretion flow, and its evolving spin direction drive a continuously moving jet nozzle and large-scale jet precession. However, the jet axis does not complete a full cycle during the simulated interval, while the primary spin advances by only about one-quarter turn. Consequently, the reported results support a qualitative connection between spin or inner-flow reorientation and jet-axis motion but do not determine whether the two have directly correlated precession periods.