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Registration Number

0222U001445, 0119U002537 , R & D reports

Title

Solving of astrometrical, kinematical and astrophysical problems on the base of modern catalogues and by means of artificial neural networks.

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Head

Fedorov Petro M,

Registration Date

27-01-2022

Organization

V.N. Karazin Kharkiv National University

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 Objects of study - stars, galaxies, extragalactic sources. Research methods - processing of observational data, generalization and comparative analysis of data, mathematical apparatus of the least squares method and the method of vector spherical harmonics, data filtering, probability theory and mathematical statistics. The main goal of this project is to create a high-density sample of extragalactic sources for the transition from the ICRF reference frame to the Gaia one and to solve a number of astrophysical problems. The second goal of the project is to derive the kinematic parameters of various subsystems of the Galaxy. In general, the following scientific results were obtained during the reporting period: 1) using different machine learning algorithms a catalog of extragalactic sources, called Northern Extragalactic WISE × Pan-STARRS (NEWS) catalog, has been created. It covers almost 3/4 of the sky in a wide optical-infrared range; 2) using the created software, which allows to identify multi-component sources in images, it has been possible to identify two candidates for gravitationally lensed quasars (GLQ), which have double images, between which there is a galaxy; 3) the software for rapid coordinate identification of objects, as well as for visualization and comparison of data contained in very large directories has been created; 4) using modern mathematical methods, a comparative analysis of stellar proper motions from the PMA and GaiaDR2 catalogues has been performed, main sequence stars have been selected taking into account interstellar absorption and reddening, as well as for these main sequence stars from the PMA and GaiaDR2 catalogues, located within heliocentric distances 1 kpc. kinematic parameters of the Galaxy have been derived based on the Ogorodnikov-Milne model and decomposition of the stellar velocity field on vector spherical harmonics; 5) using ZVSH, the kinematic parameters of the Galaxy have been derived separately for the northern and s

Product Description

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Akhmetov Volodymyr S.
Velichko Аnna
Dmytrenko Artem
Psarov Volodymyr O.
Fedorov Petro M.

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2022-03-09