Resonant Effects of a Bar on the Galactic Disk Kinematics Perpendicular to Its Plane

Abstract

Detailed analysis of kinematics of the Milky Way disk in the solar neighborhood based on the GAIA DR3 catalog reveals the existence of peculiarities in the stellar velocity distribution perpendicular to the galactic plane. We study the influence of resonances -- the outer Lindblad resonance and the outer vertical Lindblad resonance -- of a rotating bar with stellar oscillations perpendicular to the plane of the disk, and their role in shaping the spatial and the velocity distributions of stars. We find that the $Z$ and $V_Z$ distributions of stars with respect to $L_Z$ are affected by the outer Lindblad resonance. The existence of bar resonance with stellar oscillations perpendicular to the plane of the disk is demonstrated for a long (large semi-axis 5 kpc) and fast rotating bar with ${\Omega }_b=60.0$ $km{s}^{-1}kp{c}^{-1}$. We show also that, in the model with the long and fast rotating bar, some stars in the 2:1 OLR region deviate far from their original places, entering the bar region. A combination of resonance excitation of stellar motions at the 2:1 OLR region together with strong interaction of the stars with the bar potential leads to the formation of the group of 'escapees', i.e., stars that deviate in $R$ and $Z$ -- directions at large distances from the resonance region. Simulations, however, do not demonstrate any noticeable effect on $V_Z$-distribution of stars in the solar neighborhood

arXiv comment21 pages, 12 figures

References in corpus (59)

• galpy: A Python Library for Galactic Dynamics
• The Milky Way Tomography with SDSS: I. Stellar Number Density Distribution
• GAIA: Composition, Formation and Evolution of the Galaxy
• The mass distribution and gravitational potential of the Milky Way
• Radial Mixing in Galactic Discs
• Detection of the gravitational redshift in the orbit of the star S2 near the Galactic centre massive black hole
• Gaia Data Release 2: Photometric content and validation
• Gaia Data Release 1: Astrometry - one billion positions, two million proper motions and parallaxes
• Dynamics of Barred Galaxies
• A dynamically young and perturbed Milky Way disk
• The Effect of the Outer Lindblad Resonance of the Galactic Bar on the Local Stellar Velocity Distribution
• Riding the Spiral Waves: Implications of Stellar Migration for the Properties of Galactic Disks
• Three Dimensional Structure of the Milky Way Disk
• Dynamical modelling of the Galactic bulge and bar: the Milky Way's bar pattern speed, stellar, and dark matter mass distribution
• Origin and structure of the Galactic disc(s)
• Gas Dynamics in the Milky Way: Second Pattern Speed and Large-Scale Morphology
• Order and chaos in the local disc stellar kinematics induced by the Galactic bar
• Constraining the Galaxy's dark halo with RAVE stars
• Is the Milky Way ringing? The hunt for high velocity streams
• The origin of the Gaia phase-plane spiral
• Constraints on the Galactic Bar from the Hercules stream as traced with RAVE across the Galaxy
• Radial Distribution of Stellar Motions in Gaia DR2
• A spectroscopic survey of thick disc stars outside the solar neighbourhood
• The echo of the bar buckling: phase-space spirals in Gaia DR2
• Gaia Data Release 1, Pre-processing and source list creation
• Gas flow in barred potentials - III. Effects of varying the Quadrupole
• Transient spiral structure and the disc velocity substructure in Gaia DR2
• The GALAH survey and Gaia DR2: Linking ridges, arches and vertical waves in the kinematics of the Milky Way
• Signatures of resonance and phase mixing in the Galactic disc
• The Pattern Speed of the OH/IR Stars in the Milky Way
• Tracing the Hercules stream with Gaia and LAMOST: new evidence for a fast bar in the Milky Way
• The 4:1 Outer Lindblad Resonance of a long slow bar as a potential explanation for the Hercules stream
• A Vertical Resonance Heating Model for X- or Peanut-Shaped Galactic Bulges
• Signatures of minor mergers in Milky Way-like disc kinematics: Ringing revisited
• Identifying resonances of the Galactic bar in Gaia DR2: I. Clues from action space
• Signatures of Bulge Triaxiality from Kinematics in Baade's Window/
• Phase Space Structure in the Solar Neighbourhood
• Bending Waves in the Milky Way's disc from halo substructure
• Growth of a peanut shaped bulge via resonant trapping of stellar orbits in the vertical Inner Lindblad Resonances
• The Bar and Spiral Arms in the Milky Way: Structure and Kinematics
• DESI Observations of the Andromeda Galaxy: Revealing the Immigration History of our Nearest Neighbor
• Escapees from the bar resonances. On the presence of low-eccentricity, metal-rich stars at the Solar vicinity
• Transverse kinematics of the Galactic bar-bulge from VVV and Gaia
• Probing the Galaxy's bars via the Hercules stream
• Stellar halo substructure generated by bar resonances
• Chemo-kinematics of the Milky Way spiral arms and bar resonances: connection to ridges and moving groups in the Solar vicinity
• Energy wrinkles and phase-space folds of the last major merger
• Galactic seismology: joint evolution of impact-triggered stellar and gaseous disc corrugations
• Resonant thickening of self-gravitating discs: imposed or self-induced orbital diffusion in the tightly wound limit
• SDSS IV MaNGA: Bar pattern speed in Milky Way Analogue galaxies
• Combined dynamical effects of the bar and spiral arms in a Galaxy model. Application to the solar neighbourhood
• Bending waves excited by irregular gas inflow along warps
• Radial migration and vertical action in N-body simulations
• Properties of Fast and Slow Bars Classified by Epicyclic Frequency Curves from Photometry of Barred Galaxies
• Modeling of Spiral Structure in a Multi-Component Milky~Way-Like Galaxy
• Galactic resonance rings. Modelling of motions in the wide solar neighborhood
• Accelerated phase-mixing in the stellar halo due to a rotating bar
• Structure and Mass Distribution of the Milky Way Bulge and Disk
• Local metallicity distribution function derived from Galactic large-scale radial iron pattern modelling