Zobrazeno 1 - 10
of 197
pro vyhledávání: '"A. V. Yushchenko"'
Autor:
D. N. Doikov, A. V. Yushchenko
Publikováno v:
Odessa Astronomical Publications, Vol 32, Iss 0, Pp 55-62 (2019)
In this paper, we determine the causes of correlations between the observed logarithmic lu- minosity logL of galaxies with active nuclei (AGN) with particular attention to BL Lac type objects. The properties of flux variations of these galaxies in γ
Externí odkaz:
https://doaj.org/article/cdb6a592784f41c3a66a5f67490ce803
Publikováno v:
Odessa Astronomical Publications, Vol 30, Iss 0, Pp 69-75 (2017)
The investigation of SN1987A remnant is complicated due to absence of the source of ionizing radiation, which should excite the remnant’s atoms and molecule. X-ray radiation from the shock wave front and, in accordance with recent observations, the
Externí odkaz:
https://doaj.org/article/685dc2a0420e44e2bcc49955d87bf620
Publikováno v:
Odessa Astronomical Publications, Vol 14, Iss 0, Pp 237-240 (2017)
We present results of preliminary determinations of abundances of heavy elements in three metal-poor stars: HD37828, HD44008, HD221170. Careful comparison of observed and synthetic spectra permit us to increase the number of lines heavy elements iden
Externí odkaz:
https://doaj.org/article/7aea7620d46a4a82b6bb8de24c9b262e
Publikováno v:
Odessa Astronomical Publications, Vol 14, Iss 0, Pp 211-214 (2017)
Quasar-galaxy associations can be explained as gravitational lensing by globular clusters, located in the halos of foreground galaxies. We propose new observational test for checking this hypothesis. We used SUPERCOSMOS sky survey to find over-densit
Externí odkaz:
https://doaj.org/article/50a39877f6f34fc883cdb93859154a8f
Autor:
A. V. Shavrina, V. Khalack, N. S. Polosukhina, J. Zverko, J. Zhiznovsky, V. F. Gopka, P. North, V. V. Tsymbal, A. V. Yushchenko
Publikováno v:
Odessa Astronomical Publications, Vol 14, Iss 0, Pp 249-252 (2017)
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 lines and as blend of REE lines only. We show by model calculations that Li lines absorb si
Externí odkaz:
https://doaj.org/article/c2a38579b2f2492191ce04a00a4249e2
Publikováno v:
Odessa Astronomical Publications, Vol 14, Iss 0, Pp 17-20 (2017)
Time series analysis of 6 nights of CCD observations of WZ Sge after it's unexpected superoutburst on July 23, 2001 has shown highly asymmetric periodic variations with a period 0.d0566513(22), full amplitude 0.m218(4) and a very high asymmetry M - m
Externí odkaz:
https://doaj.org/article/8c76cfcfd8ca40508d02be1c5e4aa0ec
Autor:
A. V. Shavrina, N. S. Polosukhina, V. V. Tsymbal, Ya. V. Pavlenko, A. V. Yushchenko, V. F. Gopka, A. A. Veles
Publikováno v:
Odessa Astronomical Publications, Vol 15, Iss 0, Pp 92-96 (2017)
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 rotating stars. REE spots were also included in calculations. Slow rotating star HD101065
Externí odkaz:
https://doaj.org/article/9d24122d6f0b4a58b1aaee4fbded4f91
Publikováno v:
Odessa Astronomical Publications, Vol 17, Iss 0, Pp 109-112 (2017)
Detailed analysis of chemical abundances determined from high-resolution CCD-spectrogram of supergiant star PMMR23 (K5 I) in SMC is presented. The observation were obtained at 3.6 meter ESO La Silla telescope by Hill (1997). Spectral resolving power
Externí odkaz:
https://doaj.org/article/9c4bd01675e0403b9a5d5dd37d919585
Autor:
A. V. Yushchenko, V. F. Gopka
Publikováno v:
Odessa Astronomical Publications, Vol 7, Iss 1, Pp 156-158 (2017)
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 flux.
Externí odkaz:
https://doaj.org/article/1350114010cf418cb893d7f43fc25527
Autor:
A. V. Yushchenko, V. F. Gopka
Publikováno v:
Odessa Astronomical Publications, Vol 17, Iss 0, Pp 116-118 (2017)
We present the overview of chemical compositions of the atmospheres of seven stars with the most detailed abundance patterns -- the Sun, Przybylski's star, HD221170, Sirius, Procyon, ζCyg, δSct. The abundance pattern of the Sun is 73 chemical eleme
Externí odkaz:
https://doaj.org/article/d3559dd167be458fba6ce4ef49411763