Determination of the Parameters of Binary Supermassive Black Holes and the Level of Their Gravitational Radiation

We report new data on AO 0235+164, obtained under the program of long-term multifrequency monitoring of active galactic nuclei (AGNs). A model is proposed for finding the parameters of close binary systems of supermassive black holes (SMBHs) by using only observational data in the radio range. The methodology for determining the physical characteristics of the SMBHs includes harmonic and wavelet analyses as well as the assessment of the masses of the satellites and their orbital characteristics. It is shown that AO 0235+164 can be a very massive and close binary system containing companions with similar masses. The presence of an orbital period and a multiple half-period indicates the absence of noticeable eccentricity in the system. Estimates show that, along with such AGNs as 3C 454.3 and OJ 287, AO 0235+164 can be a high-power gravitational wave (GW) emitter accessible for detection by gravitational wave detectors such as the International Pulsar Timing Array (IPTA).