Effects of Strong Gravity On the X-ray Spectra of AGNs and BHCs

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

We computed iron line profiles and Compton reflection continua emitted by accretion discs around the black hole in AGNs andBlack Hole Candidates (BHCs). A fully relativistic treatment in Kerr metric is adopted for both the photons impinging on the disc, assumed to originate from a central primary X-ray source, and for the radiation reaching the distant observer. The local emission is modelled through a Monte Carlo simulation of the re-processing in the optically thick accreting matter. The relativistic effects result mainly in the smearing and broadening of any narrow feature, such as emission lines and absorption edges. The dependencies of the observables on the parameters of the system are illustrated.

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