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Information × Registration Number 0224U002227, 0118U002408 , R & D reports Title Comprehensive studies of the physical properties of planetary systems and ultracool dwarfs popup.stage_title Head Pavlenko Yakiv V., Доктор фізико-математичних наук Registration Date 08-02-2024 Organization Main Astronomical Observatory of the National Academy of Sciences of Ukraine popup.description2 For the first time, the behavior of emission lines formed in the flash regions and chromosphere of the star Proxima Cen was studied. The revealed differences in the content of Ti isotopes in atmospheres of components of the double star GJ 15A, GJ15B may be caused by the presence of an exoplanetary system in GJ15A. For the first time, an explanation of the nature of the broad depression centered on resonance line of neutral calcium 4227 A in the spectra of dwarf stars was discovered, analyzed, and proposed. A search for post-AGB stars in the Large and Small Magellanic Clouds was conducted. An analysis of the optical and infrared spectra of the recurrent nova V3890 Sgr obtained before and after the outburst in August 2019 was carried out. An analysis of eight IR spectra obtained by the Spitzer telescope of the recurrent nova RS Oph after the explosion in 2006 was carried out. The asymmetry of lines in spectra of the Sun and solar-type stars was investigated.The data contain important information about convective velocity fields and are useful for hydrodynamic modeling of stellar atmospheres. The possibility of determining the optical thickness, effective radius, and refractive index of stratospheric volcanic aerosol based on the data of high-precision spectropolarimetric observations in absorption band of water vapor at a wavelength of 1.378 μm obtained in Earth orbit is shown. A technique for detecting the presence of several polydisperse modes in the aerosol component of the Earth's atmosphere based on the data of measurements of spectral phase dependences of degree of linear polarization of a cloudless sky has been developed. According to spectrophotometric measurements of Saturn's atmosphere, the probable vertical structure and microphysical characteristics of aerosol component in the atmosphere of latitudinal belts of the Northern Hemisphere were determined. An independent analysis of the observations of the TESS orbital telescope was carried out. Product Description popup.authors Ivaniuk Oleksii M. Butkovs'ka Varvara V. Vidmachenko Anatoliy P. Dlugach Zhanna M. Zakhozhay Olha V. Kaminskiy Bogdan M. Krushevska Viktoriya M. Kuznetzova Juliana G. Lyubchik Yuriy P. Morozhenko Oleksandr V. Nevodovskyi Petro V. Ovsak Oleksandr S. Plachinda Sergiy I. Sheminova Valentyna A. Yushchenko Volodymyr O. popup.nrat_date 2024-02-08 Close