A precursor of a microquasar

Abstract

According to [1], a black hole (BH) with the record mass Мg = 3.123· 10 g formed from an ordinary star was discovered in galaxy М 33. The BH rotates around a companion star (CS) with the mass Мs = 1.392⋅10 g. The rotation period of the black hole found from the CS eclipse is 5 3.024 10 τ = ⋅ s. Let us show that this system is a precursor of a microquasar. Hereinafter, use is made of the designations adopted in [2]. A black hole and a companion star is a contact system, therefore both the BH and CS form their own Roche cavities. These are certain to be considered spheres with the centers in the BH and CS. Gradually both Roche cavities are filled with the matter of the CS. The process changes the distance r between the centers until the equilibrium sets in the system [3]. The rate of BH rotation V and the distance r are found from the equation of motion of the BH and the rotation period as