Composite profile of the Fe Kα spectral line emitted from a binary system of supermassive black holes |
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| Authors: | P Jovanovi? V Borka Jovanovi? D Borka T Bogdanovi? |
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| Institution: | 1. Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia;2. Atomic Physics Laboratory (040), Vin?a Institute of Nuclear Sciences, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia;3. Center for Relativistic Astrophysics, School of Physics, Georgia Institute of Technology, 837 State Street, Atlanta, GA 30332-0430, USA |
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| Abstract: | We used a model of a relativistic accretion disk around a supermassive black hole (SMBH), based on ray-tracing method in the Kerr metric, to study the variations of the composite Fe Kα line emitted from two accretion disks around SMBHs in a binary system. We assumed that the orbit of such a binary is approximately Keplerian, and simulated the composite line shapes for different orbital elements, accretion disk parameters and mass ratios of the components. The obtained results show that, if observed in the spectra of some SMBH binaries during their different orbital phases, such composite Fe Kα line profiles could be used to constrain the orbits and several properties of such SMBH binaries. |
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| Keywords: | Black holes: black-hole binaries Galaxies: active Accretion and accretion disks Spectral lines X-ray emission spectra |
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