The paper is devoted to determining the parameters of the three-dimensional Ogorodnikov—Milne kinematic model based on the Gaia DR2 star catalogue (the subset of seven million stars containing radial velocities). The behavior of the parameters as a function of the distance to stars is studied. The parameters derived from the stellar proper motions and radial velocities agree well with one another. It is noted that the angular velocity of rotation retains its stability up to distances of ~3 kpc, while the parameter responsible for the translational motion along the Y axis abruptly begins to change from distances starting from 1 kpc.

Original languageEnglish
Pages (from-to)462-473
Number of pages12
JournalAstronomy Letters
Volume45
Issue number7
DOIs
StatePublished - 2019

    Research areas

  • Galactic rotation, Ogorodnikov—Milne model, proper motions, radial velocities, stellar kinematics, Ogorodnikov-Milne model, STARS

    Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

ID: 46327892