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Information × Registration Number 0225U002923, (0122U001798) , R & D reports Title Study of the development of the Galaxy, deep and near space through their physical, chemical and dynamic properties popup.stage_title Дослідження розвитку Галактики, далекого та ближнього космосу через їх фізичні, хімічні та динамічні властивості Head Mishenina Tamara V., Доктор фізико-математичних наук Registration Date 18-04-2025 Organization Odesa I.I. Mechnikov National University popup.description1 Reproduction of chemical evolution, based on the study of the chemical composition of stars of different types and metals, generalization and application of new ideas and theoretical calculations of nucleosynthesis, stellar and galactic evolution; assessment of the gravitational influence of the galaxy's environment on the activity of the nucleus and the mass of a supermassive black hole; construction of perturbation theory in the cosmological shielding approach for models with non-trivial spatial topologies and finding a closed system of equations for metric and matter perturbations, which is necessary for modeling a large-scale structure in these models; computer modeling of large-scale structure of the Universe in the cosmological shielding approach in the case of the standard ΛCDM model; development of methods for the analysis of systematic deviations in network dimensions and methods for their reduction by collecting information about their causes, magnitude and stability through observations of reference objects with known orbits. popup.description2  The abundances of gadolinium, dysprosium, and thorium have been determined in 170 stars, and the evolution of thorium and europium in the Galactic disk has been studied. Differences in the trends of [Th/Fe] and [Eu/Fe] indicate distinct sources of their origin. The atmospheric parameters, dynamical properties, and elemental abundances of four metal-poor stars from different Galactic components were investigated, with their anomalies reproduced by models of rapidly rotating supernova progenitors. The abundances of 20 metal-deficient stars were analyzed, revealing varying levels of r-process elements, which point to different enrichment sources. The overabundances in the halo star HD47536 can be explained by the accretion of interstellar matter. Stellar evolution was studied for metal-poor giant and solar twin stars. The lines of the radioactive element promethium and its abundances were determined in the supergiants in the Magellanic Clouds, peculiar stars, Cepheids, and the giant BL138, which belongs to the dwarf galaxy Fornax. The properties of 61 isolated galaxies with active nuclei were examined, and a morphological catalog of 315,776 galaxies was created. The large-scale structure of the Universe was studied using two alternative approaches: gevolution and cosmic screening. The latter approach significantly reduces the computational time required for numerical simulations. Density and energy power spectra were obtained, showing matter distribution contrasts at different cosmological scales. Suppression of density contrast growth over time at scales exceeding the screening length provides direct evidence of the cosmic screening effect of gravitational interaction on large cosmological scales. Observations of reference objects were conducted using five telescopes. Improvements in measurement accuracy to 1 arcsec using our UASST software contribute to determining the orbits of near-Earth space objects with precision at the level of several tens of meters. Product Description popup.authors Vavilova Iryna B. Horbanova Tetiana I. Zhuk Oleksandr I. Mishenina Tamara V. Udovichenko Serhii M. Usenko Ihor O. Shakun Leonid S. Yushchenko Volodymyr O. popup.nrat_date 2025-04-18 Close