Search Publications
Compilation of Catalog of Stellar Equatorial Coordinates and B-Magnitudes Using UKRVO Plate Database
Pakuliak, L. K.; Yatsenko, A. I.; Shatokhina, S. V. +6 more
To ensure the rational use of informational resources generated by UkrVO in MAO NASU, a catalog of equatorial coordinates (α, δ) and B-magnitudes of stars was created by using plates obtained during observational campaign named FON (ukr., Photographic Sky Survey). 102 plates with field of view of 8° were processed. Digitization of plates with size…
The Scientific Use of the UKRVO Joint Digital Archive: GRBs Fields, Pluto, and Satellites of Outer Planets
Yizhakevych, O.; Andruk, V.; Pakuliak, L. +6 more
In the framework of UkrVO national project the new methods of plate digital image processing are developed. The photographic material of the UkrVO Joint Digital Archive (JDA - http://gua.db.ukr-vo.org/vo-mao/DB/archivespecial.php) is used for the solution of classic astrometric problem - positional and photometric determinations of objects registe…
Astrometry of χ and H Persei Based on Processing of Digitized Plates of Archive of the Astronomical Institute of the Academy of Sciences of the Republic of Uzbekistan
Ehgamberdiev, Sh. A.; Muminov, M. M.; Yuldoshev, Q. X. +3 more
Work is done with Epson Expression 10000XL scanner of Astronomical Institute (AI) of the Academy of Sciences of Uzbekistan. The plates were exposed with the Normal astrograph (D/F = 330mm / 3467mm, M = 59.56"/mm). The digitization of plates with (16x16) cm in size was made with resolution of 1200 dpi (1px = 1.25"). Test research was done using pla…
Explosive Nucleosynthesis at Strong Stellar Magnetization
Kondratyev, V. N.; Korovina, Yu. V.
Synthesis of iron group nuclides is considered for the ultra-magnetized astrophysical plasma in supernovae. Magnetic modification of nuclear structure is shown to shift maximum of nucleosynthesis products towards smaller mass numbers enhancing titanium yield. The results are corroborated with an excess of 44Ti revealed from the INTEGRAL…
Digital Archive of UKRVO: The Positional Accuracy of Minor Planets Determinations
Andruk, V.; Golovnya, V.
Scanning and astrometric processing of two 30x30 cm photographic plates with images of minor planets were conducted. The plates were obtained at the double wide-angle astrograph (DWAA, 400/2000) on the program of photographic sky survey and the program of small planets' observations. The plates were digitized using a flatbed scanner Epson Expressi…
Signatures of Large-Scale Structure of Universe in X-Rays
Tugay, A. V.
A new sample of 4299 galaxies with X-ray emission was obtained in this work by cross-correlating 2XMM catalog of X-ray sources with HyperLeda database of galaxies. We analyzed distributions of optical and X-ray fluxes, redshifts and X-ray luminosities for this sample. Virgo and Coma galaxy clusters can be easily detected at redshift-space distribu…
A Current Application of the Methods of Secular and Statistical Parallax
Turner, D. G.
The methods of secular and statistical parallax for homogeneous groups of Galactic stars are applied in a practical (classroom) exercise to establish the luminosity of bright B3 V stars. The solar motion of 20 km s-1 relative to group stars exceeds their random velocities of ±10 km s-1, a condition adopted for preference of s…
Ultraviolet Spectrum Variability of BP Tau
Ismailov, N. Z.; Alimardanova, F. N.; Baheddinova, G. R. +1 more
Results of the ultraviolet IUE archive spectrum researches of classic T Tauri type star BP Tau had been presented. Spectroscopic parameters of mainly strong emission lines were measured. On the more full massive which had been created on the intensity values of the emission doublet MgII λ 2800Å a variability with period P = 8.275 ± 0.005 days with…
Spectral Observations of AB Aur
Ismailov, N. Z.; Khalilov, O. V.
Results of spectral observations of the Herbig Ae/Be type star AB Aur carried out for 2008 - 2009 in SHAO were presented. The absorption component of the Hα line has a negative variable dis placement on different dates, reaching -300 km/s. To this absorption component superimposed an emission peak, which is rather unstable and can disappear com pl…
Spectral and Photometric Researches of RY Tau
Ismailov, N. Z.; Adigozalzade, H. N.
The results of analysis of the total light curve of the classic T Tauri type star RY Tau were presented. For a time at last 48 years a brightness of the star is characterized by fluctuations with amplitude about ΔV ∼1m, with characteristic time about 300 days. Firstly we were showed, that in an interval of 1983 - 2004 in V-band light va…