Three - Dimensional Resistive accretion flows around a Black Hole as an Extreme Ultraluminous X-ray source

The majority of ultraluminous X-ray sources (ULXs) are thought to be X-ray binaries powered by accretion onto a compact object above their Eddington limits. Dynamics of a thick disc of accreting magnetofluid with finite conductivity around a black hole as an extreme ULXs is presented here. The accreting plasma in the presence of an external dipole magnetic field gives rise to a current in the azimuthal direction. The azimuthal current produced due to the motion of the magnetofluid modifies the magnetic field structure inside the disc and generates a poloidal magnetic field for the disc. Magnetic lines of force can penetrate the accretion disk owing to the presence of finite resistivity. It has been shown that the dipolar magnetic field structure of the central black hole are modified inside the disk. In fact, the magnetic field lines are pushed outward in prograde regime ($agt;0$) and pushed inward in retrograde rotation ($a 0$) between the central black hole and the disc.