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Перегляд Advances in Astronomy and Space Physics за назвою

Репозиторій DSpace/Manakin

Перегляд Advances in Astronomy and Space Physics за назвою

Сортувати за: Порядок: Результатів:

  • New emission line at ~3.5 keV - observational status, connection with radiatively decaying dark matter and directions for future studies 
    Iakubovskyi, D.A. (Advances in Astronomy and Space Physics, 2014)
    Recent works of Bulbul et al. (2014) and Boyarsky et al. (2014), claiming the detection of the extra emission line with energy ∼3.5 keV in X-ray spectra of certain clusters of galaxies and nearby Andromeda galaxy, have ...
  • Nitrogen abundance in the Blue Compact Dwarf galaxies from SDSS 
    Vovk, K.B. (Advances in Astronomy and Space Physics, 2015)
    We examined all of the galaxies in the Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7) to select those with a dete ted [O ΙΙΙ ] λ4363 emission line, whih allows to derive electron temperatures in H װ regions and element ...
  • Nonlinear anticyclone structures in the Earth's atmosphere 
    Saliuk, D.; Agapitov, O. (Advances in Astronomy and Space Physics, 2011)
    We present some results of the study of nonlinear vortex structures in the Earth's atmosphere known as blocking-anticyclones. It is shown that synoptic-scale structure can be considered in the geostrophic approximation in ...
  • Nonthermal emission model of isolated X-ray pulsar RX J0420.0-5022 
    Chkheidze, N.; Babyk, Iu. (Advances in Astronomy and Space Physics, 2013)
    In this paper, an alternative theoretical interpretation to the generally assumed thermal emission models of the observed X-ray spectrum of isolated pulsar RX J0420.0-5022 is presented. It is well-known that at a pulsar ...
  • Numerical modeling of the magnetosphere with data based internal magnetic field and arbitrary magnetopause 
    Dobreva, P.S.; Kartalev, M.D. (Advances in Astronomy and Space Physics, 2011)
    We present a new model of the magnetospheric magnetic field. Using the finite element method, ChapmanFerraro problem is solved numerically in the considered approach. The whole magnetic field is a sum of: the dipole field, ...
  • Observation of maximum injection upper limit for energetic proton events according to SOHO/ERNE measurements 
    Allawi, H.; Al-Ramdhan, W.; Al-Sawad, A. (Advances in Astronomy and Space Physics, 2011)
    We analyzed 25 solar energetic particle events, with energies ∼ 1 − 100 MeV, observed with ERNE instrument onboard Solar and Heliospheric Observatory (SOHO) and found that all of the solar energetic particlse were associated ...
  • Observation of the new emission line at ~3.5 keV in X-ray spectra of galaxies and galaxy clusters 
    Iakubovskyi, D.A. (Advances in Astronomy and Space Physics, 2016)
    The detection of an unidentified emission line in the X-ray spectra of cosmic objects would be a `smoking gun'signature for the particle physics beyond the Standard Model. More than a decade of its extensive searches results ...
  • Observations of Sy2 galaxy NGC 3281 by XMM-Newton and INTEGRAL satellites 
    Vasylenko, A.A.; Fedorova, E.; Zhdanov, V.I. (Advances in Astronomy and Space Physics, 2013)
    We present the results of the analysis of X-ray properties of the Seyfert 2 galaxy NGC 3281, based on the observational data obtained by XMM-Newton and INTEGRAL within the energy ranges 0.2-12 keV and 20-150 keV, respectively. ...
  • On statistical distributions of wide binary stars 
    Chulkov, D.A.; Trushin, D.I. (Advances in Astronomy and Space Physics, 2012)
    The semi-major axis is a key parameter of binary stellar systems. In order to obtain current semi-major axis distribution we investigated a volume-limited sample of the binaries in solar neighbourhood. Obtained distribution ...
  • On the comparison of fundamental numerical ephemerides 
    Tkachuk, V.V.; Choliy, V.Ya. (Advances in Astronomy and Space Physics, 2013)
    We present the results of our comparison of three main numerical ephemerides (DELE, INPOP, EPM) for the determination of precision and errors of their dynamical coordinate systems. It was shown that all of them have ...
  • On the extension of Helmert transform 
    Choliy, V.Ya. (Advances in Astronomy and Space Physics, 2014)
    The article deals with the method of comparison of the coordinate systems used by two quite different scientific disciplines: stellar astronomy and the geodesy. Geodesic Helmert transform is analysed along with a series ...
  • On the massive disks in low surface brightness galaxies 
    Saburova, A.S. (Advances in Astronomy and Space Physics, 2011)
    On the example of four low surface brightness galaxies we demonstrate that the mass-to-light ratio of their disks may be found from the condition of marginal gravitational stability. In this case their surface densities ...
  • On the non universality of surface density of galaxies 
    Del Popolo, A. (Advances in Astronomy and Space Physics, 2012)
    We studied the correlation between the central surface density of dark matter haloes and the halo core radius of galaxy and galaxy recently studied on a wide range of scales. For this aim we used the secondary infall model, ...
  • On the question of detecting granulation signal in CoRoT light curves of A and B stars 
    Ghazaryan, S. (Advances in Astronomy and Space Physics, 2013)
    We applied the procedure written by us to HgMn targets observed both through CoRoT astero and exo channels to check its usefulness for search of possible existence of solar-type granulation signature in their power spectrum. ...
  • On the selection effects in catalogues of binary stars 
    Isaeva, A.A. (Advances in Astronomy and Space Physics, 2012)
    Investigation of physical properties of different kinds of binary stars can provide us with an invaluable information about star formation and evolution. To obtain present-day distributions of binaries along various ...
  • On the structure of pulsar magnetospheres 
    Malov, I.F.; Nikitina, E.B. (Advances in Astronomy and Space Physics, 2012)
    The angles β between rotation and magnetic axes in the radio pulsar magnetospheres can be calculated with several methods. In this paper we present the results of calculations for three samples of radio pulsars at 10, 20 ...
  • Optical observations of selected asteroids with measurable Yarkovsky effect 
    Pomazan, A.V.; Maigurova, N.V. (Advances in Astronomy and Space Physics, 2013)
    The results of the observations of 10 asteroids for 2009-2012 and their analysis are presented here. The asteroids were selected based on the available list of asteroids with relatively large deviations from the unperturbed ...
  • Parametric modeling of global TEC fields 
    Prokhorenkov, A.S.; Choliy, V.Ya. (Advances in Astronomy and Space Physics, 2012)
    We applied the autoregressive moving average statistical modelling to analysis and forecasting of the global Total Electron Content maps. Autoregressive moving average is a parametric time series and fields modelling method, ...
  • Particle module of Piernik MHD code 
    Drazkowska, J.; Hanasz, M.; Kowalik, K. (Advances in Astronomy and Space Physics, 2011)
    Piernik is a multi-fluid grid magnetohydrodynamic code based on the Relaxing Total Variation Diminishing conservative scheme. The original code has been extended by addition of the dust described within the particle ...
  • Pc1-pulsations: the parallel structure in the magnetosphere plasma with the admixture of the heavy ions 
    Mikhailova, O.S.; Klimushkin, D.Yu.; Mager, P.N. (Advances in Astronomy and Space Physics, 2012)
    The paper deals with the parallel structure of ultra-low frequency waves. To obtain the function describing the wave field we use the quasi-perpendicular approximation (k ̝ » k ֽֽ). Different regions of the wave propagation ...

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