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Information × Registration Number 0221U101438, 0120U105327 , R & D reports Title Simulations of velocity maps in active galactic nuclei popup.stage_title Head Bannikova Olena Y., Доктор фізико-математичних наук Registration Date 21-01-2021 Organization Radio Astronomical Institute of the National Academy of Sciences of Ukraine popup.description2  The object of the investigation is active galactic nuclei. The goal of the investigation is to analyze of the numerical simulations of the dusty torus in active galactic nuclei and to construct the velocity and velocity dispersion maps. The methods of the investigation are numerical simulation of the N-body dynamic problem, the ray tracing algorithms. The results and their novelty. In the framework of the project "Simulations of velocity maps in the active galactic nuclei", the following results were obtained: 1. The N-body simulations of a torus consisting of up to 128 000 clouds in the gravitational field of a super massive black hole, with initial conditions corresponding to the beginning of an active stage, show that the torus achieves a state of equilibrium. The distribution of the clouds in the torus cross-section in the equilibrium state is Gaussian with a thick vertical structure as required by the unified scheme. 2. Oscillations of the central region of the torus cross-section are present in our simulations. They retain during the whole time of the torus evolution while decreasing in amplitude. On the basis of a new expression of the gravitational potential of the torus with an elliptical cross-section, it is shown that these oscillations are related to box-orbits in a smooth torus potential. 3. The model velocity and velocity dispersion maps for the torus are constructed using the resulting distribution of clouds from the N-body simulations. We take into account the obscuration effects by a ray tracing algorithm adapted to the ALMA resolution. 4. We found a new estimation of the SMBH mass in NGC1068 taking into account the influence of the torus self-gravity for the range of the torus inclination angles and for the relative radii of the clouds. 5. The model maps demonstrate that the peaks of the velocity dispersion maps are related to a throat of the torus which can be seen by an observer at some inclination angles. We built the model velocity dispers Product Description popup.authors popup.nrat_date 2021-01-21 Close