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Registration Number

0219U003441, 0116U001545 , R & D reports

Title

Radiative transfer in nonuniform plasma of the solar atmosphere and in nebular media; solar activity - geophysical manifestations.

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Head

Stodilka Myroslav Ivanovych,

Registration Date

14-02-2019

Organization

Ivan Franko National University of Lviv

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Based on observations in the barium line ? 4554.03 A, models of the inhomogeneous solar atmosphere were constructed, and influence of magnetic field on the photospheric convection was investigated. Solar convection in the field of horizontal velocities on granulation scales was obtained for the first time. Based on observations we identified characteristics of the jets. Studying shells of planetary nebulae, we established their masses, physical characteristics, chemical composition and distances to them, which are used to define the internal structure of the Galaxy and nearby galaxies. The spatial density distribution and the ionizing radiation field were refined by studying dwarf galaxies with different characteristics with the help of the method of multicomponent modeling of the glow. We studied the relationship between geomagnetic disturbances and physical parameters of the solar wind and the radio emission of the Sun. We constructed model of a stable forecast of geomagnetic disturbances with a lead time of about a day. The database of observations of artificial earth satellites (AES) was replenished. We obtained new data on temporal changes in their behavior, on the effect of solar activity on the movement of some satellites. The results obtained allow to understand better the physics of phenomena and processes occurring on the Sun, and are a valuable material for testing magnetodynamic models of solar and stellar atmospheres. The developed approach of combining the simulation of the glow of dwarf galaxies with chemical-dynamic simulations of their evolution is used to verify compliance with the observations. Observation of satellites and data on the influence of solar activity on their movement are necessary to solve the problems of space navigation support, monitoring, analysis and forecasting the state of the near-Earth space. A database of the Ukrainian network UMOS (Lviv component) was formed, a geomagnetic disturbance database and a local database of images of the solar disk have practical applications in geophysics, since they allow to improve space weather forecasts.

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Баран Олександра Андріївна
Гірняк Марія Богданівна
Ковальчук Марія Миронівна
Мелех Богдан Ярославович
Присяжний Андрій Ігорович
Стоділка Мирослав Іванович
Сумарук Юрій Петрович

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2020-04-02