Standard thin-disk luminosity
= Standard thin-disk luminosity
Integrating the <standard thin-disk dissipation flux> gives
$$
L_{\rm thin}=\frac{GM\dot M}{2R_{\rm in}}
=\frac12\dot M R_{\rm in}^2\Omega_{K,\rm in}^2.
$$
Half of the Newtonian potential-energy decrease remains as orbital kinetic energy until the inner edge.