Search Publications
Statistical analysis of the probability of globular clusters interactions with each other and with the galactic centre according to Gaia DR2 data on the cosmological time scale
Ishchenko, M.; Sobolenko, M.; Berczik, P. +1 more
The main idea of the work is to study the dynamic evolution of the orbits of globular clusters (GCs) lookback in time obtained from the cosmological models that are closest to the potential of the Galaxy. This allows us to estimate the probability of close passages ("collisions") of the GC with each other and with the Galactic central in the Galax…
Hyades kinematics and the relationship between galactic coordinates and its angular distance from the apex with GAIA EDR3
Elsanhoury, W. H.; Al-Johani, A. S.; Al-Juhani, A. +6 more
In this paper, we have improved the Hyades members with aid of the Gaia EDR3 source. We have studied their kinematics, including computations of the convergent point with AD-diagram method such as (A0, D0) = (79.48 ± 0.11°, 6.85 ± 0.38°), their spatial velocities U, V, W (km/s), their morphology with 3D. A relation was established for Hyades stars…
Observation of the grazing occultation of the star TYC 1280-832-1 by the asteroid (486) Cremona
Kleshchonok, V. V.; Karbovsky, V. L.; Buromsky, M. I. +1 more
A description of the method for observing the occultation of stars by asteroids at the astronomical complex for observing the occultation of stars by Soiar system bodies is given. The complex uses an Apogee Alta U47 CCD camera as a light deiector, which operates in a time delay and integration (TDI) mode. Results of the study of the ocultation phe…
Changes of plasma parameters in Earth magnetosphere tail during substorm initialization
Grigorenko, E. E.; Kronberg, E. A.; Kozak, L. V. +3 more
Catalog of positions and B magnitudes of stars of the part of Kitab northern sky survey (FON) project
Andruk, V. M.; Muminov, M. M.; Yuldoshev, Q. X. +3 more
The works of processing of Kitab's plates of FON project was completed. It was used 1963 plates. The catalogue of equatorial coordinates and B-magnitudes of 13 413 268 stars and galaxies up to B ≤ 17.5m for the epoch 1984.97 was compiled. The Epson Expression 10000XL scanner was used for digitization with the mode 1200 dpi, the size of plates are …
A catalogue of candidate Red Clump stars in the Tycho-2.
Rybka, S. P.
The separation of red horizontal branch giants from reduced proper motions
Rybka, S. P.
The possibility to use reduced proper motions for distinguishing red horizontal branch giants from foreground stars is substantiated. Our approach is developed on the basis of HIPPARCOS astrometric data and near-infrared 2MASS photometric data taken from the UCAC2 BSS catalogue. The application of maximum-likelihood technique to analyse the distri…
Graphical method for estimation of accuracy of astrometric catalogues
Nefedjev, Yu. A.; Rizvanov, N. G.; Rakhimov, L. I. +1 more
We propose a new method for the estimation of the accuracy of star positions and proper motions in astrometric catalogues based on the comparison of the star positions in catalogue a under investigation and the HIPPARCOS catalogue in various epochs but for a standard equinox. In this case the comparison results are represented as a curve. On the a…
Catalogue of stars with high proper motions (version 1)
Ivanov, G. A.
A catalogue (astrometric and astrophysical parameters) of 251000 stars with high proper motions (more than 40 mas/year) was compiled using original determinations from FONAK1.0 catalogue, data from the catalogues Hipparcos, Tycho-2, CMC11, PPM, NPM1, NLTT, GCVS, as well as the data from published sources (ftp://ftp.mao.kiev.ua/pub/astro/h-pms.dat)
Local kinematics of dwarfs from the Tycho-2 data
Rybka, S. P.
The stellar velocity field of about 70000 dwarfs within 2 kps from the Sun is investigated from the "Tycho-2" data and known MK spectral classification. The Ogorodnikov-Milne model of a three-dimensional differential velocity field is used. The generalized Oort constants and components of the solar motion with respect to various spectral groups ar…