Radio and X-ray Constraints on Accreting Black Hole Models for ULXs

We test competing black hole accretion models proposed for Ultra-Luminous X-ray sources (ULXs). We do this by first developing a generalised coupled disk-jet model in which some fraction of the total accretion power Pa is efficiently removed from the accretion disk by a magnetic torque responsible for jet formation. Thus, for different black hole masses, mass accretion rates and magnetic coupling strength, we are able to self-consistently calculate and determine the relative importance of the modified disk emission, as well as the overall jet emission due to synchrotron, Self-Synchrotron Comptonisation (SSC) and Inverse Compton (IC). We demonstrate that the observed X-ray properties of ULXs are consistent with all three of the competing black hole models: microblazar, high-mass X-ray binary, intermediate mass black hole. Moreover, we further demonstrate that the radio properties of ULXs offer a means of distinguish-ing the models.... revise after conclusions finished Key words: accretion, accretion disks – black hole physics – X-rays: binaries – relativistic jets.