Jet enhanced accretion growth of supermassive black holes

We investigate the effect of a disc-driven jet on the accretion growth of cosmological supermassive black holes (SMBHs). The presence of a jet enhances the mass growth rate because for a given luminosity, the mass accretion rate, $\dot M_{\mathrm a}$, is higher (or equivalently, the radiative efficiency εr is lower for a fixed $\dot M_{\mathrm a}$) than that predicted by standard accretion disc th...