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The Shape of the Kα Line as the Evidence for the Black Hole Existence

Published online by Cambridge University Press:  26 May 2016

Alexander F. Zakharov  and
Serge V. Repin
Alexander F. Zakharov
Affiliation:
State Scientific Centre – Institute of Theoretical and Experimental Physics, 25, B. Cheremushkinskaya st., Moscow, 117259, Russia
Serge V. Repin
Affiliation:
Space Research Institute, 84/32, Profsoyuznaya st., Moscow, 117810, Russia

Abstract

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Observations of Seyfert galaxies in X-ray region reveal the wide emissive lines in their spectra, which can arise in inner parts of accretion disks, where the effects of General Relativity (GR) must be taken into account. A spectrum of a solitary emission line of a hot spot in Kerr accretion disk is simulated, depending on the radial coordinate r and the angular momentum a = J/M of a black hole, under the assumption of equatorial circular motion of a hot spot. It is shown that the characteristic two-peak line profile with the sharp edges arises at a large distance, (about r ≈ (3 − 10) rg). The inner regions emit the line, which is observed with one maximum and extremely wide red wing. We present results of simulations for the isothermal and Shakura – Sunayev disks.

Type
Part 3 Theoretical Considerations
Information
Symposium - International Astronomical Union , Volume 214: High Energy Processes and Phenomena in Astrophysics , 2003 , pp. 97 - 100
Copyright
Copyright © Astronomical Society of the Pacific 2003 

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