Gopasuk Stepan Ilyich General data:
07.07.1930 - 08.08.2005
Place of birth: Legaty village, Brest region, Byelorussian SSR
Studied in: Ivan Franko Lviv State University (since 1999 Ivan Franko Lviv National University) (1954);
Key interests: solar physics, magnetic fields of the Sun and stars. PhD Thesis: Development of flares and magnetic fields on the Sun (1963 ); ScD Thesis: Magnetic fields and motions in the solar atmosphere (1975 );
Biography:
He was born on July 7, 1930 in the Legates village of the Brest region of the Byelorussian SSR.
In 1954 he graduated from Ivan Franko Lviv State University.
Since 1954 he has been an employee of the Crimean Astrophysical Observatory. Since 1987 he worked as the head of the laboratory of solar physics, since 1989 he was the chief researcher.
In 1963 he defended his dissertation "Development of flares and magnetic fields in the Sun" and in 1975 his doctoral dissertation "Magnetic fields and motions in the solar atmosphere".
Since 1967 he has been a member of the International Astronomical Union.
In 2000 he was awarded the title of "Honored Worker of Science and Technology of Ukraine".
in the 1980s, together with V. I. Abramenko and M. B. Ogir, they studied the structure of vertical electric currents and Hα-flares of two active regions. Electric currents were calculated on the basis of the transverse component of the observed photospheric magnetic field. Hα-flares appear mainly in places where electric currents are directed upwards.
in the 80's of the twentieth century together with Lazareva L. F. on maps of the magnetic field and the field of radial velocities, which were built on magnetographic observations in the line Fel λ 5250.2 A for AO №251 September 1961 in the localization of solar flares, analyzed fluxes and the velocity of the plasma in the time interval ± 7'from the moment of the event.
He died on August 8, 2005 in the Naukovy urban village.
The main scientific works are devoted to solving the fundamental problems of solar physics, in particular the problems of solar magnetism. He showed important patterns in the movements of plasma and magnetic field at the stage of appearance and disappearance of sunspots, which makes it possible to understand the physical mechanisms that lead to the concentration and decay of the magnetic field on the Sun's surface. He obtained a number of results on the nature of active and quiet areas: found a global electric current in the active industry, justified its role in the formation and sustainability of the active industry; showed that local currents are concentrated mainly in short and low magnetic loops; a significant part of the photospheric magnetic field is due to currents flowing in the photosphere; found that photospheric movements play an important role in the generation of electric currents. He created a method for studying the structure of the magnetic field in the upper layers of the solar atmosphere. Together with O. S. Gopasyuk proved that the observed magnetic field in the solar chromosphere is a superposition of potential and current fields. Derived equations that describe such a field as powerless. Detected torsional vibrations of sunspots with periods of 40 minutes and 6 days. Conducted a comprehensive study of solar flares. He found a close connection between the appearance of flashes and the intensification of motion and rotation of spots as sources of accumulation of magnetic energy of electric currents. He proved the presence of shock waves in flares and studied their role in the development of Hα-flares. He established the connection between the occurrence of flashes and the direction of electric current, found asymmetry in Hα flows and rigid X-ray emission of flashes. He studied the role of compression and expansion of the field of magnetic loops filled with cold plasma and accelerated electrons in changing the intensity of synchrotron and hard X-rays. Obtained the characteristics of the acceleration spectrum of electrons, cold plasma and magnetic field.
He is the author and co-author of more than 190 scientific papers, a review of solar electrodynamics and a monograph on solar physics.
Main publications:
1. Эволюция активной области, ее токовых систем /Абраменко В. И., Гопасюк С. И., Огирь М. Б.// Изв. Крым. астрофиз. обсерв., 1988, С. 151-170
2. Потоки вещества и поле фотосферных скоростей в районах возникновения солнечных вспышек/Гопасюк С. И., Лазарева Л. Ф. Препр. Владивосток: Инт-т Космофиз. исслед. и распростан. радио волн, 1988, 16 с.
Sources:
1 Астрономы России 1917-2017/ науч. ред. А.М.Черепащук, Казань, Казан. фед. ун-т, 2017.- 568с- C.114, 115
2 Реферативный журнал. 51 астрономия., М.: ВИНИТИ, 1988, №12, С.76
