Influence of Black Hole Spin on the Shape of the Fe K Alpha Spectral Line: the Case of 3c 405
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Here we analyze how the angular momenta (spins) of black holes in the centers of Active Galactic Nuclei (AGN) affect the shape of the Fe K alpha line emitted from their accretion disks. For that purpose, we compared the observed line profile in the case of radio galaxy 3C405 (Cygnus A) with its profiles, obtained by numerical simulations based on ray-tracing method in the Kerr metric. Our results show that the spins of rotating central black holes of AGN have significant influence on their Fe K alpha line shapes. Also, we found that in the case of Cygnus A the observed line is probably emitted from the innermost region of its slightly inclined accretion disk around very slowly rotating or even stationary central black hole.
Keywords:galaxies: active: individual (3C 405, Cygnus A) / X-rays: galaxies
Source:Baltic Astronomy, 2011, 20, 3, 468-471
- 8th Serbian Conference on Spectral Line Shapes in Astrophysics (SCSLSA), Jun 05-10, 2011, Serbia