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Information × Registration Number 0219U001885, 0117U006125 , R & D reports Title A study of the physical properties of active galaxies nuclei with narrow lines and large absorption in the X-ray range popup.stage_title Head Vasylenko A.A., Registration Date 21-03-2019 Organization Main Astronomical Observatory popup.description2 As a part of the implementation the theme the following work was performed: 1.The search of Seyfert 2 galaxies with large intrinsic absorption was performed, for which observations were made by the NuSTAR X-ray Observatory. Only those galaxies for which no articles were published analyzing the observations found were selected, and as a result of which a sample of 10 galaxies was created; 2. The X-ray spectral analysis for the sample of galaxies was performed using phenomenological standard models to obtain the input values of the parameters for further fitting with numerical physical models. We found that there are several galaxies do not show a large intrinsic absorption (IGR J07565-4139, IGR J16024-6107, IGR J23308 + 7120). Thus, these objects has been removed from further analysis; 3. During deep spectral analysis that were made using numerical models for NGC 3281, NGC 7172, Mrk 417 and IGR J16351-5806, was showed that characteristics of those intrinsic absorption may indicate that they have a dense gas-dusty environment with a complex non-heterogeneous structure, which has zones of both relatively low and high density. The results of spectral and temporal analysis of observations of the galaxy NGC 7172 gave evidence of luminosity variation due to the variability of the central primary source. It has been established that X-ray absorption in the active nucleus of the NGC 7172 galaxy can be explained by the presence of a gas-dust medium with a toroidal structure at a distance of about 3.7 parsecs from the center of the nucleus; 4. Based on the results of our work, an article in the journal "Kinematics and Physics of Celestial Bodies" (2018, No. 6, p. 41-56) with the title "Shaded active core of the NGC 7172 galaxy as observed by NuSTAR" was published. Product Description popup.authors Василенко А.А. popup.nrat_date 2020-04-02 Close