Mass flow rates in and outflow rates from AGN accretion discs
  We derive analytical expressions for the mass flow rates in and from accretion discs, taking into account the Eddington limit. This allows us to connect the basic properties of outflows with those of the accretion flow. As an example, we derive the radial surface density distribution in the accretion disc of Mrk 231. 
Marvin Blank, Wolfgang J. Duschl
astro-ph.GA astro-ph.CO