Search Publications
Extragalactic X-ray discrete sources
Zadorozhna L. V.; Tugay A. V.; Shevchenko S. Yu.
Extra-galactic X-ray research with the launch of XMM-Newton has become the forefront of X-ray astronomy. X-ray sources outside our galaxy are the other galaxies - normal galaxies, radio galaxies, quasars, blazars, Seyfert galaxies, as well as extended sources in galaxy clusters - the glow of cluster's halo. X-ray space observatory's equipment reac…
Observations of interacting galaxies NGC 2341 and NGC 2342 in X-ray band
Tugay, A. V.; Shevchenko, S. Yu.; Ponomarenko, O. O.
The study of radiation of the interacting galaxies in different ranges enables to identify various processes occurring in them. The most active processes (such as star birth, material accretion onto the black holes, burster flashes, etc.) cause the appearance of X-rays. In our work, we studied the nature of the interacting pair of galaxies NGC 234…
Spectra of X-ray galaxies in filaments
Tugay, A. V.
Large-scale structure of Universe consists of galaxy clusters connected by filaments. Single filaments can be detected at redshifts up to 0.15. The general characteriscis of X-ray spectra of Sloan Digital Sky Survey galaxies, that lies outside clusters, are considered in this work. Seyfert 1 AGN's are the main type of X-ray sources in the selected…
Features of the X-ray spectra of active galactic nuclei Mrk 1498
Vasylenko, A. A.; Fedorova, E. V.; Zhdanov, V. I.
We present results of our analysis of the XMM-Newton and Swift observations of the galaxy with Sy 1.9 active nucleus Mrk 1498. We analyze the spectra obtained from three EPIC cameras (PN and both MOS) within the 0.2-12 keV energy range and Swift/BAT instrument within the range of 14-195 keV. We demonstrate that for the X-ray spectrum of the AGN in…
X-Ray spectra of AGN's with strong emission lines
Tugay, A. V.; Vasylenko, A. A.; Zaetc, T. A.
Using XMM-Newton archive we obtained X-ray spectra for 12 AGN's with strong optical emission lines. Models of our spectra corresponds to Seyfert galaxies. We conclude that for Seyfert galaxies power-law spectral index in 2-12 keV band is less than 1.9 and minimal X-ray flux exceeds 1% of optical flux in u-band.