Fig. 1. Broadband photon spectra from thermal electrons in RIAFs.

We use the parameter set for model A (reference model) with M = 10⁸M_⊙ and various $\dot{m}$. The solid, long-dashed, short-dashed, dotted, and dotted-dashed lines are for $\dot{m}=0.03,1.1\times 10^{-2},3.7\times 10^{-3},1.3\times 10^{-3},4.6\times 10^{-4}$, respectively. The photons of energies below the vertical dotted line are mainly emitted by the synchrotron process, while the photons above the energy are produced by the Comptonization process.