Abstract:
General relativistic, advective, viscous, two-temperature accretion disc solutions are studied
around a Schwarzschild black hole. The thermodynamics of the flow is described by the relativistic equation
of state or Chattopadhyay and Ryu equation of state modified for a two-temperature regime. The cooling
processes considered are bremsstrahlung, synchrotron and the Comptonization of these photons. The
degeneracy of accretion solutions in the two-temperature regime is resolved using the so called ‘maximum
entropy’ methodology. Utilizing this method, we analyzed the unique solutions and the corresponding
spectra for a broad range of parameter space. Interplay between heating due to viscous dissipation and
cooling due to different radiation mechanisms plays a significant role in determining the solution and
spectrum obtained. In the end, we analyze the observation of a low luminosity AGN, NGC 3998, fitted using
our model.
