Four types of black hole system will be discussed including stellar-mass and supermassive black holes. All of the black hole systems are active and have powerful collimated outflows. Empirically determined relationships between the outflow beam power, accretion disk luminosity, and black hole mass indicate that the outflows are spin powered. The general equation that describes a spin powered outflow is rewritten in dimensionless separable form allowing a determination of the black hole spin. Accretion disk properties such as the disk magnetic field strength and mass accretion rate can also be determined for each source. Good agreement is found between spin values obtained with the new method and published values obtained with well- established methods. The spin values obtained range from about (0.4 - 1), and are found to be independent of source type. Accretion disk magnetic field strengths for the three AGN samples have similar distributions and mean values of about 10 kG, while those for stellar-mass GBHs have mean values of about 100 MG. The new method is independent of a specific accretion disk model; thus the results can be applied to study and constrain disk models.
Meeting Link: https://cesnet.zoom.us/j/95068304093?pwd=VzcwdC9CZ05hc1d2OXhFeHNBaFJLQT09 Passcode: 789866 Meeting ID: 950 6830 4093