Search Results - "A. V. Shavrina"

Ozone columns obtained by ground-based remote sensing in Kiev for Aura Ozone Measuring Instrument validation by Shavrina, A. V., Pavlenko, Y. V., Veles, A., Syniavskyi, I., Kroon, M.

“…Ground‐based observations with a Fourier transform spectrometer in the infrared region (FTIR) were performed in Kiev (Ukraine) during the time frames…”
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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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Lithium in chemically peculiar CP stars with magnetic fields by Polosukhina, N S, Shavrina, A V

“…The problem of lithium in chemically peculiar Ap-CP stars has been the subject of debate for many years. The main reason for this is a lack of spectral…”
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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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Spots structure and stratification of helium and silicon in the atmosphere of He-weak star HD 21699 by Shavrina, A. V., Glagolevskij, Yu. V., Silvester, J., Chuntonov, G. A., Khalack, V. R., Pavlenko, Ya. V.

“…The magnetic star HD 21699 possesses a unique magnetic field structure where the magnetic dipole is displaced from the centre by 0.4 ± 0.1 of the stellar…”
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Features of calcium and strontium distribution on the surface of CP star HD49976 by Glagolevskij, Yu. V., Shavrina, A. V., Chuntonov, G. A., Lyashko, D. A.

“…Modelling the magnetic field structure in HD49976, we obtained a map of its magnetic field distribution on the surface and its main parameters. Simulating the…”
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Spectrophotometry of HD 182255 by Glagolevskij, Yu. V., Shavrina, A. V., Chountonov, G. A.

“…We investigate the HD 182255, a star earlier suspected to be helium-weak. We show it to be a SiHe-w-type CP object. Our study revealed four regions with…”
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Structure of the atmosphere of the magnetic star hd21699 by Glagolevskij, Yu. V., Chuntonov, G. A., Shavrina, A. V.

“…The temperature distribution with depth in the atmosphere of the magnetic star HD21699 is modelled for each observed rotational phase using Hδ line profiles…”
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Quantitative analysis of the spectrum of the magnetic roAp star HD 83368 with “lithium” spots by Shavrina, A V, Polosukhina, N S, Tsymbal, V, Khalak, V

“…Preliminary results of a synthetic-spectrum analysis of the elemental abundances in the atmosphere of the "spotted" roAp star HD 83368 are presented. The…”
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Some properties of the He-w star HD 35502 by Glagolevskij, Yu. V., Chountonov, G. A., Shavrina, A. V., Pavlenko, Ya. V.

“…This is a preliminary study of the star HD 35502. Its magnetic field has been measured in different phases of its period. Preliminary values of the magnetic…”
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A new approach to modeling the surface magnetic fields of chemically peculiar stars by Khalak, V R, Khalak, Yu N, Shavrina, A V, Polosukhina, N S

“…A reconstruction of the line-of-sight component and modulus of the surface-magnetic-field vector is proposed, using a model with artificial point sources of…”
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Effects of spot structure of lines of rare earths and non-LTE effects on lithium abundance estimates for two roAp stars by Mashonkina, L I, Shavrina, A V, Khalack, V, Polosukhina, N S, Tsymbal, V V, Vygonets, V

“…Taking into account blending of the lithium 6108 Å line profile by adjacent rare-earth lines together with their spotted surface structure does not appreciably…”
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The chemical compositions and surface structures of two roAp stars with lithium spots (HD 83368 and HD 60435) by Shavrina, A V, Polosukhina, N S, Zverko, J, Khalak, V, Tsymbal, V V, Ziznovsky, J

“…The spectra of two roAp stars have been analyzed as part of a project to study lithium in magnetic Ap stars. Variability of the Li I 6708 Å resonance doublet…”
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Spot system and stratification of some chemical elements in the atmosphere of He-weak star HD 21699 by Glagolevskij, Yu. V., Shavrina, A. V., Sylvestre, J., Chountonov, G. A., Pavlenko, Ya. V., Khalak, V. R.

“…Surface helium and silicon distribution of a He-weak CP star HD21699 was examined using the spectra obtained at different phases of the star’s rotational…”
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Anomalous abundance of lithium in the roAp star HD 12098 recently discovered in the northern hemisphere of the sky by Shavrina, A. V., Polosukhina, N. S., Drake, N. A., Kudryavtsev, D. O.

“…Spectral observations of Ap-CP stars with the BTA (Special Astronomical Observatory, Russian Academy of Sciences) using the NES echelle spectrometer have…”
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Remote sensing of some greenhouse gases by Fourier-spectrometry in Kyiv by Shavrina, Angelina V., Veles, Alexander A.

“…The values of the total N2O and O3 amount (column amounts) in the atmosphere above Kyiv city were determined using observed IR spectra of direct solar…”
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Lithium and the Li-Li isotope ratio in the atmospheres of some sharp-lined roAp stars by Shavrina, A V, Polosukhina, N S, Khan, S, Pavlenko, Ya V, Kudryavtsev, D O, Khalack, V R, Mikhailitskaya, N G, Lyubchik, Yu P, Yushchenko, A V, Hatzes, A, Mkrtichian, D E, Il'in, I V

“…The lambda 6708 A and 6103 A lithium lines in the high-resolution spectra of some sharp-lined roAp stars are analyzed using three spectral-synthesis codes…”
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Lithium and the 6Li-7Li isotope ratio in the atmospheres of some sharp-lined roAp stars by Shavrina, A. V., Polosukhina, N. S., Khan, S., Pavlenko, Ya. V., Kudryavtsev, D. O., Khalack, V. R., Mikhaĭlitskaya, N. G., Lyubchik, Yu. P., Yushchenko, A. V., Hatzes, A., Mkrtichian, D. E., Il’in, I. V.

“…The λ 6708 Å and 6103 Å lithium lines in the high-resolution spectra of some sharp-lined roAp stars are analyzed using three spectral-synthesis codes STARSP,…”
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ON THE GF-VALUES FOR SOME DIATOMIC MOLECULAR SPECTRA by L. A. Kuznetsova, A. V. Shavrina

“…In view of rich structure of the energy levels and the variety of transition types which are observable, molecules are the useful tool for investigation of…”
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