Bulletin of Taras Shevchenko National University of Kyiv. Astronomy, no. 55, p. 29-34 (2017)
Peculiar AGNs from the INTEGRAL and RXTE data
E. Fedorova, Ph. D.,
Astronomical Observatory of National Taras Shevchenko University of Kyiv, Kyiv
A. Vasylenko, Ph. D.,
Main Astronomical Observatory of the NAS of Ukraine, Kyiv
V. Zhdanov, Dr. Sci., Prof.,
Astronomical Observatory of National Taras Shevchenko University of Kyiv, Kyiv
Abstract
We analysed how the active galactic nucleus (AGN) X-ray primary continuum depends on AGN activity in radio, using the data of RXTE Spectral & Timing Database (Rossi X-ray Timing Explorer) and INTEGRAL (INTErnational Gamma-Ray Astrophysics Laboratory). Our aim is to test the relation between spectral shapes of these AGNs and the prediction of the “spinparadigm” model of the AGN “central engine”. We have found that for the major part of radio-quiet (RQ) AGNs the value of highenergy exponential cut-off in primary spectrum appears to be significantly higher than 100 keV and thus follows the “spinparadigm” predictions. In the same time, near 25 % of radio-loud (RL) AGNs demonstrate the high-energy cut-off at the energies above 150 keV, contradicting the “spin paradigm”. We have composed a sample of “peculiar” 69 RQ and 10 RL AGNs that seem to contradict to the “spin paradigm” for further individual studies of these objects.
Key words
galaxies: Seyfert – X-rays: galaxies: active – galaxies
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