Now showing items 1-20 of 182

    • 3D numerical hydrodynamical models of the precessing thick accretion disk and ON- and OFF-state generations in microquasars 

      Nazarenko, V. V.; Nazarenko, S. V. (Одеський національний університет імені І. І. Мечникова, 2017)
      The thick accretion disk and donor’s wind on the example of CYG X-1 are computed. The main aim of the present simulations is to calculate the precessing thick accretion disk and ON- and OFF-state generation by the ...
    • 3D numerical hydrodynamical simulations of a radiation-driven jet launch and disappearing over low/hard state 

      Nazarenko, V. V.; Nazarenko, S. V. (Одеський національний університет імені І. І. Мечникова, 2016)
      In the present research we have calculated 3D numerical hydrodynamical simulations of a radiation-driven jet launch and disappearing over low/hard state. The calculations show that the jet launch occurs at the beginning ...
    • 3D numerical hydrodynamical simulations of a radiation-driven jet launch and disappearing over low/hard state 

      Nazarenko, V. V.; Nazarenko, S. V. (Одеський національний університет імені І. І. Мечникова, 2016)
      In the present research we have calculated 3D numerical hydrodynamical simulations of a radiation-driven jet launch and disappearing over low/hard state. The calculations show that the jet launch occurs at the beginning ...
    • A modification of gauss' method for preliminary determination of a celestial body's orbit 

      Baziei, Oleksandr A. (Одеський національний університет імені І. І. Мечникова, 2015)
      A modification of classical Gauss’ method for determination of Keplerian elements from the observed positions is considered in this paper. The modification involves the exhaustive enumeration of all possible orbital ...
    • A NEW 800 mm AUTOMATIC TELESCOPE 

      Andrievsky, Serhii M.; Molotov, I. E.; Fashchevsky, N. N.; Podlesnyak, S. V.; Zhukov, V. V.; Kouprianov, V. V.; Kashuba, S. G.; Kashuba, V. I.; Mel’nichenko, V. F.; Gorbanev, Juri M.; Андрієвський, Сергій Михайлович (Astroprint, 2013)
      ABSTRACT. A new automatic telescope, a 800-millimeter main mirror catadioptric anastigmatic aplanat, was constructed by specialists of Odessa National University Astronomical observatory (Ukraine) in cooperation with their ...
    • A technique for simultaneous measurement of circular and linear polarization with a single-channel polarimeter 

      Kolesnikov, S. V.; Breus, V. V.; Kiselev, N. N.; Andronov, Ivan L. (Одеський національний університет імені І. І. Мечникова, 2016)
      We present a technique for simultaneous measurement of circular and linear polarization with the single-channel polarimeter, that is used in Crimean astrophysical observatory for many years. Methods and a computer ...
    • A technique for simultaneous measurement of circular and linear polarization with a single-channel polarimeter 

      Kolesnikov, S. V.; Breus, V. V.; Kiselev, N. N.; Andronov, Ivan L. (Одеський національний університет імені І. І. Мечникова, 2016)
      We present a technique for simultaneous measurement of circular and linear polarization with the single-channel polarimeter, that is used in Crimean astrophysical observatory for many years. Methods and a computer program ...
    • ABOUT CHEMICAL COMPOSITION OF SUPERGIANT PMMR145 IN SMALL MAGELLANIC CLOUD. OSMIUM. 

      Gopka, Vera F.; Shavrina, Angelina V.; Vasilyeva, S. V.; Andrievsky, Serhii M.; Андрієвський, Сергій Михайлович (Astroprint, 2012)
      ABSTRACT. The abundance analysis of six Ksupergiants of the Small Magellanic (Hill 1997) showed that the heavier elements (La, Ce, Nd, Eu) have the excess relative to iron [El/Fe]=+0.4 dex, on average, for the sample of ...
    • ALEXANDER YAKOVLEVICH ORLOV (Odessa period – 1912-1934) 

      Karetnikov V. H. (Astroprint, 2012)
      A.Ya. Orlov came to Odessa in the fall of 1912. Just before it he defended his thesis (1912) and visited several countries. In Odessa he occupied position of the chair of Astronomy Department and head of Astronomical ...
    • Algorithms of multi frequency radiometry in the conditions of broadband interference 

      Orlov, V. V.; Lytvynenko, O. A.; Galanin, V. V. (Одеський національний університет імені І. І. Мечникова, 2018)
      The development of digital technologies for multi-frequency signal reception in the low-frequency range creates the prerequisites for the application of optimal algorithms for real-time beamforming without changing the ...
    • ANALYSIS OF THE PARAMETERS AND ABUNDANCE OF N-CAPTURE ELEMENTS FOR FOUR STARS WITH DIFFERENT METALLICITY 

      Basak, N. Yu.; Mishenina, T. V. (Astroprint, 2013)
      ABSTRACT. Based on the spectra obtained with echelle spectrograph SOPHIE (1.93 m telescope, OHP, France) and the selection of lines (Basak & Mishenina, 2012). we have redefined the parameters and have determined the ...
    • ANALYSIS OF THE VARIABILITY AND THE SPECTRUM OF PERIODS OF EXTRAGALACTIC SOURCE OJ 287 IN THE RADIO WAVES 

      Donskykh, A.; Ryabov, Myhaylo I.; Sukharev, A. L.; Aller, M. F. (Astroprint, 2013)
      We analyzed long-term monitoring of data flux of extragalactic source OJ 287 obtained at frequencies of 14.5 GHz (1974-2011), 8 GHz (1971-2011), 4.8GHz and (1979-2010), on the RT-26, University of Michigan, USA. Variability ...
    • Angular structure of FRII radio sources 3C169.1 and 3C263 at decameter wavelengths 

      Vashchishin, R. V.; Shepelev, V. A.; Lozinskyy, A. B.; Lytvynenko, O. A. (Одеський національний університет імені І. І. Мечникова, 2016)
      The radio galaxy 3C169.1 and the quasar 3C263, located at nearly the same distance with red shift z>0.6, have similar morphological and spectral characteristics. The maps of the sources obtained at decimeter and centimeter ...
    • ARE THE s-CEPHEIDS CROSSING THE INSTABILITY STRIP FOR THE FIRST TIME? 

      Andrievsky, Serhii M.; Harbuzov H. O.; Doikov, D. N.; Андрієвський, Сергій Михайлович (Astroprint, 2012)
      Using the literature data on secular period changes reported for the small-amplitude Cepheids (s-Cepheids) it is shown that these stars are not crossing the instability strip for the first time. After correction of the ...
    • ”Asymptotic parabola” fits for smoothing generally asymmetric light curves 

      Andrych, K. D.; Andronov, Ivan L.; Chinarova, L. L.; Marsakova, V. I. (Одеський національний університет імені І. І. Мечникова, 2015)
      A computer program is introduced, which allows to determine statistically optimal approximation using the "Asymptotic Parabola" fit, or, in other words, the spline consisting of polynomials of order 1,2,1, or two lines ...
    • CCD OBSERVATIONS OF THE INTERMEDIATE POLAR MU CAM AND GSC 04370-00206 

      Chinarova, L. L.; Andronov, Ivan L.; Gubin, E. G. (Astroprint, 2010-07)
      Results of CCD observations of MU Cam and GSC 04370-00206 obtained at the 60 cm telescope of the RSI \Astronomical Observatory" of the Odessa National University.
    • CHARACTERISTICS OF THE PERIOD CHANGES IN MIRA-TYPE VARIABLES 

      Marsakova, V. I. (Astroprint, 2014)
      The period changes in a sample of Miratype variables were analysed and classified. Characteristics of the long-term cyclicity in the period changes were obtained.
    • CHEMICAL COMPOSITION AND ATMOSPHERE PARAMETERS OF THE DOUBLE-MODE CEPHEID U TRA 

      Usenko, I. A.; Kniazev, A. Yu.; Berdnikov, L. N.; Kravtsov, V. V. (Astroprint, 2013)
      Four high-resolution spectra of the doble-mode Cepheid U TrA have been obtained during its pulsational period. For the first time, we obtained accurate atmosphere parameters and the chemical abundance of a number of ...
    • CHEMICAL COMPOSITION OF PECULIAR STAR HD91375 THE MEMBER OF SIRIUS MOVING GROUP 

      Yushchenko, V. A. (Astroprint, 2010)
      We present the results of determinations of the abundances of chemical elements in the atmosphere of hot chemically peculiar star HD91375 - member of Sirius moving group. We used the observations made at 8.2 meter ESO ...
    • CHEMICAL EVOLUTION IN ALGOLS 

      Glazunova, L. V. (Astroprint, 2012)
      ABSTRACT. We discuss the chemical abundance in Algol-type systems produced by different authors. Till this time most evolutionary changes in the chemical abundance of the components of Algols were studied by carbon depletion. ...