Maps of the g-factors of the Fe Kα emission originating in the accretion disks of black holes with spins ﹩a=0﹩ (top), ﹩a=0.5﹩ (middle), and ﹩a=0.998﹩ (bottom). All panels: ﹩h=5\,{r}_{{\rm{g}}}﹩, ﹩i=82\mathop{.}\limits^{^\circ }5﹩, ﹩\beta =0.5﹩. Here and in the following, ﹩{k}_{{\rm{r}}}^{\tilde{\mu }}﹩ denotes the photon packets’ received wavevector (subscript r) in the reference frame of a coordinate stationary observer (marked with a tilde above the coordinate index).