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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:

  • Long-term photopolarimetric variability of DD Ser 
    Belan, S.P.; Shakhovskoy, D.N. (Advances in Astronomy and Space Physics, 2013)
    We present some results of UBVRI-photopolarimetric observations of DD Ser, a poorly studied and understood Ae-star. The long-term component of light variation is detected, with the period of about fifteen years. Variability ...
  • Low-resolution spectroscopy of the chromospherically active stars 61 Cyg AB with small telescopes 
    Pokhvala, S.M.; Zhilyaev, B.E.; Reshetnyk, V.M.; Shavlovskij, V.I. (Advances in Astronomy and Space Physics, 2014)
    We carried out high-speed low-resolution spectroscopy of two stars, 61 Cyg A and B with small telescopes. They are known as chromospherically active stars of the K5V (A) and K7V (B) spectral types. These two stars are ...
  • Low-resolution spectrum of comet C/2004 Q2 (Machholz) 
    Shubina, O.; Korsun, P.; Ivashchenko, Yu. (Advances in Astronomy and Space Physics, 2012)
    We analysed the spectroscopic data for comet C/2004 Q2 (Machholz), obtained on the Zeiss-600 telescope in Andrushivka Astronomical Observatory on January 29, 2005. The observed spectrum covers a wavelength range 3600-9200 ...
  • Lucky image performance simulation on the basis of optical turbulence data obtained on Mt. Shatdzhatmaz 
    Safonov, B.S. (Advances in Astronomy and Space Physics, 2011)
    Lucky imaging is a method allowing to achieve difiraction resolution on a moderate ground-based telescopes with the cost of magnitude limitation. To adequately evaluate capabilities of this technique for a given place (Mt. ...
  • Magnetized Rossby waves in mid-latitude ionosphere F-layer 
    Saliuk, D.A.; Agapitov, O.; Milinevsky, G.P. (Advances in Astronomy and Space Physics, 2012)
    We present the results of study of the ionosphere quasi-periodic perturbations on the basis of the analysis of the critical f0F2 frequency variations. The temporal scales of the perturbations are about 7 days and relative ...
  • Magnetosheath and solar wind turbulence processes features identification 
    Prokhorenkov, A.S.; Kozak, L.V.; Lui, A.T.Y. (Advances in Astronomy and Space Physics, 2015)
    A different kind of analysis should be applied to a turbulent process, than that applied to a nondisturbed medium. In this work we present the result of extended self-similarity analysis (ESS) by comparing between different ...
  • Magnetospheric ULF waves driven by external sources 
    Agapitov, O.V.; Cheremnykh, O.K. (Advances in Astronomy and Space Physics, 2013)
    The multi-spacecraft missions (Cluster and THEMIS) observations allowed to collect large data base for Ultra Low Frequency (ULF) waves properties, their localization, and sources. Here we focused mainly on these recent ...
  • MgH lines in the spectrum of Arcturus 
    Kushniruk, I.O.; Pavlenko, Ya.V.; Kaminskiy, B.M. (Advances in Astronomy and Space Physics, 2013)
    The synthetic spectra of MgH lines were computed for the grid of the model atmospheres and compared with the observed spectrum of Arcturus. The parameters of the atmosphere of Arcturus for log g = 1.5 and Tₑff = 4300K were ...
  • MHD waves in the plasma system with dipole magnetic field configuration 
    Cheremnykh, S.O.; Agapitov, O. (Advances in Astronomy and Space Physics, 2012)
    The eigenmode spectrum of the ultra low frequency (ULF) waves in the Earth magnetosphere is discrete and consists of Alfvén and slow magnetosonic modes. Their interaction depends on ionospheric conductivity and the magnetic ...
  • Modeling radial velocities of HD 240210 with the Genetic Algorithm 
    Rozenkiewicz, A.; Gozdziewski, K.; Migaszewski, C. (Advances in Astronomy and Space Physics, 2011)
    More than 450 extrasolar planets are known to date. To detect these intriguing objects many photometric and radial velocity surveys are in progress. We developed the Keplerian FITting code, to model published and available ...
  • Multipoint observations of Ionospheric Alfvén Resonance 
    Baru, N.A.; Koloskov, A.V.; Yampolsky, Y.M.; Rakhmatulin, R.A. (Advances in Astronomy and Space Physics, 2016)
    Among the processes that form properties of the geospace in the circumterrestrial plasma the electromagnetic resonances of the Earth, such as Schummann Resonance (SR) and Ionospheric Alfvén Resonance (IAR) are of great ...
  • 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 ...

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