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Information × Registration Number 0222U003420, 0119U100329 , R & D reports Title Small-scale structure of solar magnetic fields, solar activity and its influence on the geosphere. popup.stage_title Head Lozytsky Vsevolod G., Registration Date 22-03-2022 Organization Taras Shevchenko National University of Kyiv popup.description2 Objects of research: the Sun, magnetic fields in the active regions of the Sun and its bowels, solar activity, aerosols in the Earth's atmosphere. Objective: To obtain new, more detailed data on local magnetic fields in such processes of activity on the Sun as sunspots and flashes. Construction of realistic multilevel models of highly ionized iron and silicon atoms in order to diagnose physical conditions in the corona of the Sun. Study of the role of torsional oscillations in the generation of an alternating radial magnetic field of the Sun. Research of the influence of aerosols on the climatic characteristics of the atmosphere and air quality over Kyiv. Research methods: spectral and spectropolarimetric, as well as methods of magnetohydrodynamics and mathematical statistics. Magnetic fields in sunspots and flashes were studied according to observations on telescopes of GST AO KNU, ACU-5 GAO NASU and GST BBSO and revealed evolutionary changes of strong (up to 3 kGs) magnetic fields in a powerful limbic flash 17.07.1981. at heights of 10-18 mm according to measurements in lines K Ca II 3933.7 Å, H δ 4101.7 Å, He I 4471.5 Å and H in 4861.3 Å; new evidence of the existence of extremely strong magnetic fields in the range of 104 Gs in sunspots and flashes was revealed. Realistic multilevel models of highly ionized iron atoms FeX, FeXI, FeXIII, FeXIV and silicon SiIX, SiX are created on the basis of astrophysical base of CHIANTI spectroscopic data; the probabilities of photoexcitation, spontaneous and forced excitation removal, the rate of excitation by electrons and protons of the levels of these ions are calculated. As a result of numerical calculations within the MHD theory the decisive role of torsional oscillations in the generation of an alternating radial magnetic field is demonstrated.  Product Description popup.authors Danylevskyi Vasyl O. Kaminskyj Sеrgiy V. Kryvodubsky Valeriy N. Shchukina Nataliya G. Yakovkin Ivan I. popup.nrat_date 2022-03-22 Close