On the relation of accretion rate and spin induced jet power in low   luminosity AGN
  From Liu and Han (2014), the accretion-dominated jet power has a linear proportionality with the accretion rate, whereas the power law index is <=0.5 at lower accretion rate. Attributing the jet power in low accretion rate AGN to the black hole spin, it implies that the jet power has a flatter spectrum than the accretion-dominated jet versus the accretion rate. The black hole must be spinning rapidly for producing such jet power efficiently, and this may allow us to find high-spin black holes in the radio-loud low-luminosity AGN. 
Xiang Liu, Zhen Zhang, Zhenhua Han (Xinjiang Astronomical Observatory,   CAS)
astro-ph.GA astro-ph.HE