  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.
