Abstract
We have solved the Ogorodnikov–Milne stellar-kinematics equations in the Galactic rectangular coordinate system based on the total velocities for a special sample of stars with radial velocities from the final Gaia Data Release 3 catalogue. We have found the region of applicability of the linear model and the regions that it describes poorly. We have constructed a second-order model that takes into account the peculiarities of stellar kinematics more accurately and showed its applicability for stars at distances up to 5 kpc.
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ACKNOWLEDGMENTS
We are grateful to the Gaia Consortium for the provided Gaia DR3 data. We thank the anonymous referees whose valuable remarks allowed the quality of the paper to be improved.
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Tsvetkov, A.S., Amosov, F.A. Determination of the Parameters of a Nonlinear Kinematic Galactic Rotation Model Based on the Proper Motions and Radial Velocities of Stars from the Gaia DR3 Catalogue. Astron. Lett. 49, 331–344 (2023). https://doi.org/10.1134/S1063773723060051
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DOI: https://doi.org/10.1134/S1063773723060051