Iron Line Complex from Illuminated Accretion Disk Atmospheres

Computer Science

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Galactic Nuclei, Circumnuclear Matter, And Bulges, Interstellar Medium And Nebulae In External Galaxies, X-Ray Sources, X-Ray Bursts, X-Ray, Spectroscopy And Spectrophotometry

Scientific paper

We present full set of model atmosphere equations corresponding to an accretion disk around a supermassive black hole illuminated by hard X-ray power-law. Model equations allow for multiple Compton scattering of radiation on free electrons, and for large relative photon-electron energy exchange. We present spectra in specific intensities integrated over disk surface. Outgoing intensity spectra show soft X-ray excess below 1 keV, and distinct Kα and Kβ fluorescent lines of iron. We demonstrate the existence of the Compton shoulder and claim that it can contribute to the asymmetry and equivalent widths of some observed lines in AGN.

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