APO3 - The Origins of Massive Black Holes and Quasars at High Redshifts |
Speaker_ |
Zakharov, Alexander |
Talk _ |
Model of Radiating Annuli near Black Holes for Fe K_\alpha Line Profile Interpretations |
Abstract _ |
X-ray observations of microquasars and Seyfert galaxies reveal the broad emission lines in their spectra, which can arise in the innermost parts of accretion disks. We consider a radiating annulus model to simulate spectral line shapes. That is a natural approximation for narrow emitting circular rings without extra astrophysical assumptions about emissivity laws. Recently Muller & Camenzind (2004) presented results of their calculations and classified different types of spectral line shapes and described their origin. We clarified their results and showed that triangular spectral lines could arise for nearest annuli and high inclination angles. We discussed a possibility of appearance of narrow spectral line shapes as a result of spiralling evolution of matter along quasi-circular orbits. |