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Registration Number

0215U007019, 0114U002824 , R & D reports

Title

Investigation the kinematics of the Galaxy using the proper motions of stars from modern catalogues created with use ground-based and space-based data. Stage 2: Creation a special sample of stars in different subsystems for determination of their kinematic parameters using the proper motions of stars from the new version of the XPM catalogue and with use data from other catalogues.

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Head

Fedorov Peter,

Registration Date

27-01-2015

Organization

Institute of Radio Astronomy National Academy of Sciences of Ukraine

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The stars, galaxies and extragalactic objects are the objects of research. The aim of this work is to create a new high density catalogue of positions and proper motions of stars (ХРМ2U) on basis of the Shmidt surveys of northern and southern sky. Method of study - the processing of observational data, the generalization and comparative analysis of data, the methods of photographic and CCD astrometry , the mathematical apparatus of least squares method, filtering data , probability theory and mathematical statistics. The results are presented in 3 works (2 abstracts and 1 article) as well as in 2 oral reports at 2 conferences. The following results were obtained during the reporting period: 1. The final version of the ХРМ2U catalogue, that contains positions, proper motions and magnitudes for about 1 milliard of objects that cover all sky, is created. The data from UCAC4 were used as a reference catalogue. 2. Positions of stars in the catalogue are obtained on the epoch of observations of certain plate in J, R and I filters. Mean square error of positions of stars after reduction to the UCAC4 system on the epoch of observations is from 70 to 250 mas in depending on a certain plate and magnitudes. 3. Proper motions of stars in catalogue were derived for every star from their positions in every epoch of observations. For a south hemisphere the 3 time points were usually used, with a middle time length approximately 23 years. For a north hemisphere – the 4 points, with a middle time length about 50 years. The mean square error of proper motions also appreciably depends on a magnitude and varies from the 2-5 mas/year for bright stars to the 5-15 mas/year for faint stars. 4. The special samples of stars from different subsystems were created for further determination of their kinematics parameters on the basis of proper motions of stars from the ХРМ2U. The results of research are partially published and are partially prepared for publication, as well as partially are still under analysis. They can be given for use to all interested organizations and professionals in the astrometry, celestial mechanics and stellar astronomy both in Ukraine and abroad. Expected assumption: improvement of the linking between the Hipparcos coordinate system and the ICRF2 system will be probable. Astrometry , coordinate systems , astrometric catalogues. Terms of receipt of report: by agreement V.N.Karazin Kharkiv National University, Maidan Svobody 4, Kharkov, 61022, Ukraine; Institute of Radio Astronomy of the National Academy of Sciences of Ukraine (IRA NASU) 4, Chervonopraporna St., Kharkov, 61002, Ukraine.

Product Description

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А.Величко
В. Ахметов
В. Цвєткова
В. Шульга
П. Федоров

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2020-04-02