Search Results - "Gopka, V. F"

Analysis of Actinium Abundances in the Atmosphere of Cepheid HIP13962 by Gopka, V. F., Shavrina, A. V., Yushchenko, V. A., Pavlenko, Ya. V., Yushchenko, A. V., Glazunova, L. V.

“…Actinium is a radioactive element that has an isotope 227 Ac with the longest half-life of 21.772(3) years. It is the third element in the actinoid group, in…”
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Peculiarities of the abundance of chemical elements in the atmosphere of PMMR23-red supergiant in the Small Magellanic Cloud due to interstellar gas accretion by Yushchenko, A. V., Gopka, V. F., Shavrina, A. V., Yushchenko, V. A., Vasileva, S. V., Andrievsky, S. M., Raikov, A. A., Kim, S., Rittipruk, P., Jeong, Y., Kang, Y.-W.

“…The chemical composition of the PMMR23 red supergiant located in the Small Magellanic Cloud (SMC) is analyzed. The abundance of 35 chemical elements and the…”
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Actinium Abundance in the Atmospheres of Three Red Supergiants in the Magellanic Clouds by Gopka, V. F., Shavrina, A. V., Yushchenko, V. A., Yushchenko, A. V., Pavlenko, Ya. V., Andrievsky, S. M., Vasileva, S. V., Kim, Ch, Jeong, Y., Lyubchik, Yu. P.

“…The actinium abundance in the atmospheres of red supergiants PMMR23 and PMMR144 in the Small Magellanic Cloud and RM_1-667 in the Large Magellanic Cloud was…”
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Atmospheric chemical composition of the halo star HD 221170 from a synthetic-spectrum analysis by Gopka, V F, Yushchenko, A V, Mishenina, T V, Kim, Chulhee, Musaev, F A, Bondar', A V

“…The atmospheric abundances of 30 chemical elements in the halo star HD 221170 are analyzed by fitting synthetic spectra to observed spectra (i) with a…”
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Identification of absorption lines of short half-life actinides in the spectrum of Przybylski’s star (HD 101065) by Gopka, V. F., Yushchenko, A. V., Yushchenko, V. A., Panov, I. V., Kim, Ch

“…Absorption lines of some actinides, namely, actinium ( Z = 89), protactinium (91), neptunium (93), plutonium (94), americium (95), curium (96), berkelium (97),…”
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The abundances of heavy elements in the atmosphere of hyades giant 6 Tauri by V. F. Gopka

“…Comparison of synthetic spectrum of the б Tauri photosphere and high quality spectral atlas of this star permit us to identify absorption lines of iron and…”
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A hypothesis for explaining the origin of Przybylski’s star (HD 101065) by Gopka, V. F., Ul’yanov, O. M., Andrievskii, S. M.

“…Many unidentified lines in the spectrum of Przybylski’s star (HD 101065) match well the spectral lines of radioactive elements, including the lines of…”
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THE CHEMICAL COMPOSITION OF PROCYON by A. V. Yushchenko, V. F. Gopka

“…The review of last studies on the chemical composition of Procyon showed that the abundances of 55 elements were investigated in the atmosphere of Procyon. The…”
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THE IDENTIFICATION OF ABSORPTION LINES OF DYSPROSIUM IN THE SOLAR SPECTRUM by A. V. Yushchenko, V. F. Gopka

“…12 additional absorption lines of Dy II were identified on the basis of calculations of synthetic spectrum and it's comparison with the spectral atlas of solar…”
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THE ABUNDANCES OF SOME HEAVY ELEMENTS IN THE ATMOSPHERE OF γ TAURI by A. V. Yushchenko, V. F. Gopka

“…Comparison of synthetic spectrum of the γ Tauri photosphere and high quality spectral atlases of this star permit us to identify absorption lines of rubidium,…”
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STELLAR ABUNDANCE. FROM QUANTITY TO QUALITY? by A. V. Yushchenko, V. F. Gopka

“…We present the overview of chemical compositions of the atmospheres of seven stars with the most detailed abundance patterns -- the Sun, Przybylski's star,…”
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Characteristic features of the spectrum of the unique roAp star HD 101065 near the 6708 Å lithium resonance doublet by Shavrina, A V, Polosukhina, N S, Pavlenko, Ya V, Yushchenko, A V, Gopka, V F

“…Synthetic spectrum of the peculiar roAp star HD 101065 (Przybylski's Star) have been computed in the wavelength interval 6705.8-6708.7 Å in order to describe…”
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ABOUT THE HEAVY ELEMENTS ABUNDANCES IN THE ATMOSPHERES OF STARS WITH LOW METALLICITY by V. F. Gopka, A. V. Yushchenko, T. V. Mishenina, V. V. Kovtyukh

“…We present results of preliminary determinations of abundances of heavy elements in three metal-poor stars: HD37828, HD44008, HD221170. Careful comparison of…”
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ABUNDANCES OF r-PROCESS ELEMENTS IN THE PHOTOSPHERE OF RED SUPERGIANT STAR PMMR23 IN SMALL MAGELLANIC CLOUD by S. V. Vasil'eva, V. F. Gopka, A. V. Yushchenko, S. M. Andryevsky

“…Detailed analysis of chemical abundances determined from high-resolution CCD-spectrogram of supergiant star PMMR23 (K5 I) in SMC is presented. The observation…”
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TWENTY YEARS OF THE ODESSA CORRESPONDENCE ASTRONOMICAL COURSES by I. L. Andronov, L. L. Chinarova, V. F. Gopka, E. V. Menchenkova (Luthardt), M. I. Myalkovskij, M. P. Kosmykina (Yasinskaya), L. S. Kudashkina, A. V. Yushchenko

“…The work of the Odessa Correspondence Courses is briefly described…”
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LITHIUM BLEND FITTING FOR roAp STAR HD101065 (PRZYBYLSKI'S STAR) by A. V. Shavrina, V. Khalack, N. S. Polosukhina, J. Zverko, J. Zhiznovsky, V. F. Gopka, P. North, V. V. Tsymbal, A. V. Yushchenko

“…We have considered the possibility for modeling of remarkable spectral feature 6708 Å for HD101065 (Przybylski's star) in two ways - as a blend of Li and REE…”
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Some features of roAp stars spectrum by A. V. Shavrina, N. S. Polosukhina, V. V. Tsymbal, Ya. V. Pavlenko, A. V. Yushchenko, V. F. Gopka, A. A. Veles

“…We have shown the possibility for modelling Li blend6708 A, for two roAp stars, HD83368 and HD60435, taking into account lithium spots on the surfaces of these…”
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THE NATURE OF MAGNETIC CHEMICALLY PECULIAR STARS PHENOMENON AND THE ORIGIN OF LITHIUM by V. F. Gopka, A. V. Shavrina, A. V. Yushchenko, V. A. Yushchenko

“…According to the modern theory of the evolution of chemical elements their origin seems understandable for most of the elements, from the lightest up to the…”
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PRELIMINARY STUDY OF RED SUPERGIANT RM_1-667 IN THE LARGE MAGELLANIC CLOUD by V. F. Gopka, A. Shavrina, S. Vasilyeva, A. Yushchenko, S. Andrievsky, V. Yushchenko

“…The observed lines of hydrogen and another strong lines in the spectrum of RM_1-667 (red region of spectra, 5900-7100 Å, spectral type is K7 I) are discussed…”
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ABOUT CHEMICAL COMPOSITION OF SUPERGIANT PMMR145 IN SMALL MAGELLANIC CLOUD. OSMIUM by V. F. Gopka, A. V. Shavrina, S. V. Vasilyeva, S. M. Andrievsky

“…The abundance analysis of six Ksupergiants of the Small Magellanic Cloud (Hill 1997) showed that the heavier elements (La, Ce, Nd, Eu) have the excess relative…”
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