Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998tx19.confe.450z&link_type=abstract
Abstracts of the 19th Texas Symposium on Relativistic Astrophysics and Cosmology, held in Paris, France, Dec. 14-18, 1998. Eds.:
Astronomy and Astrophysics
Astrophysics
Scientific paper
Recent observations of Seyfert galaxies, carried out by ASCA and RXTE seem to indicate that broad iron K_alpha line (6.4 keV) takes its origin in the innermost area of accretion disk around a supermassive Kerr black hole. In the region (1.5-5) r_g, where the line is assummed to arise the effects of general relativity should be taken into account. The profile of the spectral line has been simulated for different values of the specific moment a = J/M and the inclination angle i of the disk to the sky plane. The comparison of the simulated line profile with the X-ray observations of MCG-6-30-15 and MCG-5-23-16 leads to a conclusion that the most probable value of inclination angle is close to i = 30^circ. The analogous simulation, carried out under the assumptions of Newtonian theory leads to the results, which are in appreciably worse agreement with the observations.
Repin Serge V.
Zakharov Aleksandr F.
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