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In Paper by Titarchuk & Shrader the general formulation and results forphoton reprocessing (downscattering) that included recoil and Comptonizationeffects due to divergence of the flow were presented. Here we show the MonteCarlo (MC) simulated continuum and line spectra. We also provide an analyticaldescription of the simulated continuum spectra using the diffusionapproximation. We have simulated the propagation of monochromatic and continuumphotons in a bulk outflow from a compact object. Electron scattering of thephotons within the expanding flow leads to a decrease of their energy which isof first order in V/c (where V is the outflow velocity). The downscatteringeffect of first order in V/c in the diverging flow is explained bysemi-analytical calculations and confirmed by MC simulations. We conclude thatredshifted lines and downscattering bumps are intrinsic properties of thepowerful outflows for which Thomson optical depth is greater than one. Wefitted our model line profiles to the observations using four free parameters,\beta=V/c, optical depth of the wind \tau, the wind temperature kT_e and theoriginal line photon energy E_0. We show how the primary spectrum emitted closeto the black hole is modified by reprocessing in the warm wind. In theframework of the our wind model the fluorescent iron line K_alpha is formed inthe partly ionized wind as a result of illumination by central source continuumphotons. The demonstrated application of our outflow model to the XMMobservations of MCG 6-30-15, and to the ASCA observations of GRO J1655-40,points out a potential powerful spectral diagnostic for probes of theoutflow-central object connection in Galactic and extragalactic BH sources.Comment: Accepted for publication in the Astrophysical Journal and it is  scheduled for ApJ February 20, 2007, v 656, 2 issu

astrophysical journal/the astrophysical journal

Effects of Downscattering on the Continuum and Line Spectra in a Powerful Wind Environment: Monte Carlo Simulations, Analytical Results, and Data Analysis