Investigation of the Kinematics of Stars from the Gaia Data Release 2 with Radial Velocities Catalogue Using Scalar and Vector Spherical Harmonics

This paper is a continuation of our work. The proper motions and radial velocities of stars from the Gaia DR2 with RV catalogue have been decomposed. We have confirmed that the Ogorodnikov-Milne model is consistent with the observational data and found the kinematic components that are not described...

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Bibliographic Details
Published inAstronomy letters Vol. 46; no. 1; pp. 58 - 71
Main Authors Tsvetkov, A. S., Amosov, F. A., Trofmiov, D. A., Petrov, S. D.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 2020
Springer Nature B.V
Subjects
Astronomy
Astrophysics and Astroparticles
Kinematics
Observations and Techniques
Order parameters
Physics
Physics and Astronomy
Spherical harmonics
Stars
Stellar kinematics
spherical harmonics
Gaia
stellar kinematics
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Summary:This paper is a continuation of our work. The proper motions and radial velocities of stars from the Gaia DR2 with RV catalogue have been decomposed. We have confirmed that the Ogorodnikov-Milne model is consistent with the observational data and found the kinematic components that are not described by this model. The beyond-the-model harmonics have been partially identified with the nonlinear terms of the extended Oort model and the parameters of the second-order kinematic model.
ISSN:1063-7737
1562-6873
DOI:10.1134/S1063773719110070