The effect of bars and transient spirals on the vertical heating in disk galaxies

Abstract

The nature of vertical heating of disk stars in the inner as well as the outer region of disk galaxies is studied. The galactic bar (which is the strongest non-axisymmetric pattern in the disk) is shown to be a potential source of vertical heating of the disk stars in the inner region. Using a nearly self-consistent high-resolution N-body simulation of disk galaxies, the growth rate of the bar potential is found to be positively correlated with the vertical heating exponent in the inner region of galaxies. We also characterize the vertical heating in the outer region where the disk dynamics is often dominated by the presence of transient spiral waves and mild bending waves. Our simulation results suggest that the non-axisymmetric structures are capable of producing the anisotropic heating of the disk stars.

arXiv comment14 pages, 20 figures, Accepted for publication in ApJ

References in corpus (31)

• Secular Evolution and the Formation of Pseudobulges in Disk Galaxies
• GADGET: A code for collisionless and gasdynamical cosmological simulations
• The Effect of the Outer Lindblad Resonance of the Galactic Bar on the Local Stellar Velocity Distribution
• The Secular Evolution of Disk Structural Parameters
• Evolution of Stellar Bars in Live Axisymmetric Halos: Recurrent Buckling and Secular Growth
• The Distribution of Nearby Stars in Velocity Space Inferred from Hipparcos Data
• Sinking Satellites and the Heating of Galaxy Discs
• Bar-Halo Interaction and Bar Growth
• Secular bar formation in galaxies with significant amount of dark matter
• The Age of the Solar Neighbourhood
• Anatomy of the Bar Instability in Cuspy Dark Matter Halos
• Disk heating by more than one spiral density wave
• Why Buckling Stellar Bars Weaken in Disk Galaxies
• Simulations of the heating of the Galactic stellar disc
• Observational Constraints on Disk Heating as a Function of Hubble Type
• Halo Substructure and Disk Heating in a Lambda CDM Universe
• The shape of the velocity ellipsoid in NGC 488
• Growth of a peanut shaped bulge via resonant trapping of stellar orbits in the vertical Inner Lindblad Resonances
• The Extraordinary `Superthin' Spiral Galaxy UGC7321. II. The Vertical Disk Structure
• Disc heating in NGC 2985
• Stochasticity in N-body Simulations of Disc Galaxies
• Density waves in the shearing sheet I. Swing amplification
• Dark Matter Halos and Evolution of Bars in Disk Galaxies: Collisionless Models Revisited
• Dynamics of barred galaxies: effects of disk height
• Corrugations in the Disk of the Edge-On Spiral Galaxy IC2233
• Global lopsided instability in a purely stellar galactic disc
• The stellar disk thickness of LSB galaxies
• The onset of warps in Spitzer observations of edge-on spiral galaxies
• Constraints of the Clumpyness of Dark Matter Halos Through Heating of the Disk Galaxies
• The age of blue LSB galaxies
• Mechanisms of the Vertical Secular Heating of a Stellar Disk

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• Disk settling and dynamical heating: histories of Milky Way-mass stellar disks across cosmic time in the FIRE simulations
• The K2 Galactic Archaeology Program Data Release 3: Age-abundance patterns in C1-C8 and C10-C18
• Spin-up of low mass classical bulges in barred galaxies
• Gravitational scattering of stars and clusters and the heating of the Galactic disk
• Exploring the origin of thick disks using the NewHorizon and Galactica simulations
• A method to estimate stellar ages from kinematical data
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• The Fornax3D project: Assembly histories of lenticular galaxies from a combined dynamical and population orbital analysis
• Forming Lenticular Galaxies via Violent Disk Instability
• Why are some galaxy disks extremely thin?
• Dark Matter Trapping by Stellar Bars: The Shadow Bar
• A study of stellar orbit fractions: simulated IllustrisTNG galaxies compared to CALIFA observations
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• A slow bar in the dwarf irregular galaxy NGC 3741
• Disk heating and bending instability in galaxies with counterrotation
• Building the peanut: simulations and observations of peanut-shaped structures and ansae in face-on disk galaxies
• Spontaneous formation of double bars in dark matter dominated galaxies
• Dwarf irregular galaxies with extended HI gas disks: Suppression of small-scale spiral structure by dark matter halo
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• Quantifying the influence of bars on action-based dynamical modelling of disc galaxies
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• Local variations of the Stellar Velocity Ellipsoid-II: the effect of the bar in the inner regions of Auriga galaxies
• Redshift and stellar mass dependence of intrinsic shapes of disc-dominated galaxies from COSMOS observations below $z=1.0$
• Investigating the vertical distribution of the disk as a function of radial action: Results from simulations
• Massive Star Clusters in the Semi-Analytical Galaxy Formation Model L-Galaxies 2020
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