2012

The Radiative Efficiency of Hot Accretion Flows

Xie, Fu-Guo, Yuan, Feng

Understand

Two significant progresses have been made in the past years on our understanding of hot accretion flows.

One is that only a small fraction of accretion flow available at the outer boundary can finally falls onto the black hole while most of them is lost in outflow.
Another one is that electrons may directly receive a large fraction of the viscously dissipated energy in the accretion flow, i.e, $\delta\sim 0.1-0.5$.
The radiative efficiency of hot accretion flow when these two progresses are taken into account has not been systematically studied and is the subject of the present paper.

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