Spectral Properties of Accretion Disks Around Galactic and Extragalactic Black Holes

We study the spectral properties of a very general class of accretion disks which can be decomposed into three distinct components apart from a shock at \(r=r_s\): (1) An optically thick Keplerian disk on the equatorial plane (\(r>r_s\)), (2) A sub-Keplerian optically thin halo above and below this Keplerian disk \(r>r_s\) and (3) A hot, optically slim, \(\tau\sim 1\) postshock region \(r