A model turbulent Schwarzschild disk is shown here.
Turbulence is required to help disk material lose angular momentum so it can accrete onto the hole.
In doing so it may generate the powerful radiation which we observe in quasars and active galaxies. The colors indicate the frequency shift due to orbital and turbulent motions, and general relativisitic effects. Such a disk is the most likely origin of the broad Fe line . Get the high resolution TIFF format version .