Some evidence of a double black hole in NGC 1194 active galactic nucleus?
|1Vasylenko, AA, 2Fedorova, EV, 2Hnatyk, BI, 2Zhdanov, VI |
1Main Astronomical Observatory of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
2Astronomical Observatory of Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
|Kinemat. fiz. nebesnyh tel (Online) 2015, 31(1):22-31|
|Start Page: Extragalactic Astronomy|
On the basis of data from the XMM-Newton and INTEGRAL satellites, some properties of the X-ray emission from the active nucleus of the NGC 1194 galaxy are analyzed. Particular attention is paid to the energy region of X-ray spectrum between 6 and 7.5 keV, where, in addition to fluorescent iron lines FeKα (6.38 keV) and Fek (7.01 keV), we detected a new line with an energy of 6.51 keV with broad profile that is typical for relativistic iron line FeKα generated in an inclined accretion disk. Such a line configuration can be explained within the model of a double black hole system with an orbital period of the order of 6 yrs. Energies and profiles of the iron spectral lines FeKα correspond to the radiation of the accretion disks around Schwarzschild black holes with disk inclinations of 6 and 20 degrees. Some additional observations are needed to get a final conclusion about the structure of the lines and about the presence or absence of a double black hole in the core of NGC 1194.
|Keywords: double black hole, NGC 1194|
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