Open AccessInfluence of the bar on the kinematics of the Galactic disk near the Outer Lindblad Resonance. Comparison with Gaia EDR3 data
Author(s) -
A. M. Melnik,
А. К. Дамбис,
E. N. Podzolkova,
Л. Н. Бердников
Publication year - 2022
Publication title -
astronomy at the epoch of multimessenger studies. proceedings of the vak-2021 conference, aug 23–28, 2021
Language(s) - English
Resource type - Conference proceedings
DOI - 10.51194/vak2021.2022.1.1.188
Subject(s) - physics , galaxy , bar (unit) , astrophysics , kinematics , azimuth , position (finance) , galactic center , mass distribution , radial velocity , resonance (particle physics) , position angle , astronomy , classical mechanics , stars , particle physics , finance , meteorology , economics
A model of the Galaxy with the outer ring R 1 R 2 can reproduce the observed distribution of the radial, V R , and azimuthal,V T , velocity components along the Galactocentric distance, R, derived from the Gaia EDR3 data. The best agreementbetween the model and observed velocities corresponds to the time 1.8 ± 0.5 Gyr after the start of the simulation. Theangular velocity of the bar of Ω b = 55 ± 3 km s −1 kpc −1 and the position angle of the bar of θ b = 45 ± 15 ◦ provide the bestagreement between the model and observed velocities.