Parameters of SS 433 as a Massive Binary System

Abstract

Recent spectroscopic, photometric and X-ray data and their analysis allow to suggest that the unique object SS 433 is a massive X-ray binary observed at advanced evolutional stage: at the stage of second mass exchange. The normal star is overfilling its Roche lobe and overflows to the relativistic object at the thermal time scale. Supercritical precessing accretion disk is formed around the relativistic object. The origin of the relativistic jets is presumably connected with the supercritical accretion regime. Recent estimate of mass ratio for relativistic object from the analysis of optical light curves is q = M x /M v > 0.25 and from the analysis of X-ray eclipses is q ≤ 0.25. For the value q = 0.25 and mass function fx(M) = 10 M⊙ the mass of relativistic object M x = 4 M⊙. The value q = 0.2 − 0.3 corresponds to the total eclipse of the accretion disk by the normal star and that is in conflict with the optical light curves of SS 433.KeywordsLight CurveAccretion DiskLight CurfRelativistic ObjectRoche LobeThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.