Search academic texts

Information × Registration Number 0222U000959, 0117U004025 , R & D reports Title Research of fundamental physical and astronomical processes of selected objects of the Universe and prospects for practical use astroinformation popup.stage_title Head Yatskiv Yaroslav S., Доктор фізико-математичних наук Registration Date 22-01-2022 Organization Main Astronomical Observatory of the National Academy of Sciences of Ukraine popup.description2 The study of physical and evolutionary characteristics of objects in the universe at different cosmological distances and different stages of evolution was conducted. Unprecedentedly accurate data on the position in space, motion, and brightness of ~ 1 billion stars have been obtained, which is a powerful tool for studying the galactic population of star clusters. Physical processes in solar active phenomena of various scales by spectropolarimetry methods have been studied. The physical state parameters of the photospheric and chromospheric layers of the Sun's atmosphere before and during eruptive phenomena are obtained. Modeling the lower atmosphere of the Sun is carried out, and changes of the velocity field in different active formations at different stages of their development are investigated. The obtained data are important for predicting solar activity. The study of radiation scattering processes in both ordered and random media has been carried out, making it possible to conclude the influence of the structure of the medium on its scattering characteristics. Having a long series of observations of GNSS, these observations are processed, coordinates are given in one coordinate system, and coordinates are compared, and the speed of their change depends on the length of the time interval in which the coordinates are determined. A study of the multiwavelength properties of isolated galaxies with active nuclei of the Local Universe compared to the properties of galaxies with active nuclei in a dense environment. Determination of physical characteristics of spiral galaxies of late types depends on their environment's density. New data on the properties of quasars were obtained using Lyα-forest studies. Time series of up to several hundred spectra are obtained, on time scales in the subsecond range and more, up to tens of Hz. The mechanisms that connect wave processes in the stellar photosphere to form the stellar wind structure have been studied.  Product Description popup.authors Ivanova Oleksandra Viktorivna Ishchenko Maryna V. Babyk Yurii V. Vidmachenko Anatoliy P. Vasylenko Anatoliy A. Guseva Nataliya G. Dlugach Janna M. Dobrycheva Daria V. Zinchenko Igor A. Karachentseva Valentina Yu. popup.nrat_date 2022-03-09 Close