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

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Abstract

Abstract: 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.

Original languageEnglish
Pages (from-to)58-71
Number of pages14
JournalAstronomy Letters
Volume46
Issue number1
DOIs
StatePublished - 1 Jan 2020

Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Gaia
  • spherical harmonics
  • stellar kinematics

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