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Information × Registration Number 0219U003551, 0116U000830 , R & D reports Title Investigation of Galaxy kinematics on base of XPM2 catalogue data popup.stage_title Head Petro Fedorov, Registration Date 23-01-2019 Organization Kharkov National University named after V.N. Karazin popup.description2 Objects of the research are stars, galaxies, extragalactic objects. Methods of the research are observational data processing, averaging and comparative analysis of data, the mathematical least square method, filtering data, the probability theory and mathematical statistics. The main goal of the research is derivation of the Galactic kinematics parameters using stellar proper motions of different catalogues, in particular stellar proper motions of the XPM2 (PMA). The PMA catalogue of absolute proper motions was created, it was posted in the Strasbourg database and is freely available. Estimating accuracy of stellar proper motions of the PMA catalogue by their direct comparison with data from the HSOY and UCAC5 catalogues was carried out. It was shown that proper motions from these catalogues have significant random errors. Analysis of three catalogues - HSOY, UCAC5 and PMA, derived in the post-Gaia period by their comparison with those from the TGAS catalogue was carried out. It was shown that original stellar proper motions of the TGAS catalogue was distorted by a systematic error. Also it was shown that in the case of proper motions of the Hipparcos stars containing in the TGAS there is no such an error. Analysis of differences between classic proper motions of the TGAS with proper motions of the UCAC5, HSOY and PMA catalogues was carried out as well as the derived results were interpreted. Based on data of two catalogues - PMA and TGAS, kinematic analysis of bright stars of the Galaxy in the magnitude range 9 - 12 mag was carried out. The analysis was fulfilled by two methods: using the Ogorodnikov-Milne model as well as the method of decomposition of the stellar velocity field onto vector spherical harmonics. The results of the analysis are presented in figures in the form of dependencies of the kinematic parameters on magnitude. It was shown that in the bright magnitude range the kinematic parameters of the Galaxy are consistent with those accepted by the IAU. For the PMA catalogue the kinematic parameters depending on distance to stars is also presented. Kinematic parameters describing the Solar velocity as well as velocities of rotation and deformation of the stellar system were derived from the PMA stars in the magnitude range from 10 to 20 magnitude, their dependencies on magnitude are presented. Analysis of the Galactic kinematics for two Galactic subsystems namely red dwarfs and red giant samples as well as the thin disk stars as a whole was fulfilled. Kinematic parameters from proper motions of these stars by the VSH method were derived. Dependencies of the Oort constants A and B on distance to the stellar sample up to 8 kpc were derived. Analysis of kinematics of stars from the PMA, TGAS, UCAC5 and HSOY catalogues was carried out as well as comparison of the kinematic parameters derived from these catalogues data was fulfilled. When using the VSH method it was established that in the stellar velocity fields of the PMA, TGAS, UCAC5 and HSOY catalogues besides harmonics corresponding to the O-M model parameters there are also t211 and s310 extra-model coefficients. New computer programs were created. Product Description popup.authors А. Велічко В. Ахметов В. Маркаров В. Псарьов М. Іл'яшик П. Федоров popup.nrat_date 2020-04-02 Close