Analytical approximation of the emission line Fe $K_{\alpha }$ in QSO's spectra

S. V. Repin, V. N. Lukash, V. N. Strokov

In spectra of many Seyfert galaxies there is a wide emission line of Fe $K_{\alpha }$. The line profile with two maxima supposes that the line emerges in innermost regions of an accretion…