IRON K FLUORESCENT LINES FROM RELATIVISTIC, IONIZED DISCS

We present detailed Monte Carlo calculations of the iron K alpha lines from X-ray photoionized, relativistic accretion discs. The vertical i onization structure of the matter has been taken into account, and Com pton scattering and resonant absorption have been treated in detail. W e find that the ratio of lines emitted by different iron ions depends, apart from the ionization parameter, on the disc inclination angle. T he line profiles with relativistic corrections have also been calculat ed; they can be used to distinguish between different source geometrie s.