Speaker
Description
The multi-messenger light curve of the FSRQ J1048+7143 shows simultaneous quasi-periodic oscillations in the gamma-ray, optical and radio wavelengths. While in gamma rays and optical, the flaring structure consists of two subflares, the radio emissions have no such substructures.
We show that these flaring structures are consistent with a supermassive binary black hole at the center of J1048 and are caused by the coupling of the orbit with the spin of the leading jet. With the here presented model, we successfully predicted the timing of the last flare and constrained the mass ratio of the binary, allowing predictions of when it will merge. Finally, we show our model expectation of the characteristic strain of its gravitational wave emission.
*Supported by DFG (MICRO and SFB 1491)
