Bars and secular evolution in disk galaxies: Theoretical input

  title={Bars and secular evolution in disk galaxies: Theoretical input},
  author={E. Athanassoula},
Bars play a major role in driving the evolution of disk galaxies and in shaping their present properties. They cause angular momentum to be redistributed within the galaxy, emitted mainly from (near-)resonant material at the inner Lindblad resonance of the bar, and absorbed mainly by (near-)resonant material in the spheroid (i.e., the halo and, whenever relevant, the bulge) and in the outer disk. Spheroids delay and slow down the initial growth of the bar they host, but, at the later stages of… Expand
Signatures of secular evolution in disk galaxies
In this thesis we shed light on the formation and evolution of disk galaxies, which often host a stellar bar (about 2/3 of cases). In particular, we address the bar-driven secular evolution, that is,Expand
Tidally Induced Bars in Gas-rich Dwarf Galaxies Orbiting the Milky Way
Bars in galaxies may form not only through instability, but also as a result of an interaction with another galaxy. In particular, they may appear in disky dwarf galaxies interacting with MilkyExpand
Vertical disc heating in Milky Way-sized galaxies in a cosmological context
Vertically extended, high velocity dispersion stellar distributions appear to be a ubiquitous feature of disc galaxies, and both internal and external mechanisms have been proposed to be the majorExpand
Cosmic evolution of bars in simulations of galaxy formation
We investigate the evolution of two bars formed in fully self-consistent hydrodynamic simulations of the formation of Milky Way-mass galaxies. One galaxy shows higher central mass concentration andExpand
Bars and spirals in tidal interactions with an ensemble of galaxy mass models
We present simulations of the gaseous and stellar material in several different galaxy mass models under the influence of different tidal fly-bys to assess the changes in their bar and spiralExpand
Disk origin of the Milky Way bulge: the necessity of the thick disk
In the Milky Way bulge, metal-rich stars form a strong bar and are more peanut-shaped than metal-poor stars. It has recently been claimed that this behavior is driven by the initial (i.e., before barExpand
The imprints of bars on the vertical stellar population gradients of galactic bulges
This is the second paper of a series aimed to study the stellar kinematics and population properties of bulges in highly inclined barred galaxies. In this work, we carry out a detailed analysis ofExpand
Bar quenching in gas-rich galaxies
Galaxy surveys have suggested that rapid and sustained decrease in the star-formation rate, "quenching", in massive disk galaxies is frequently related to the presence of a bar. Optical and near-IRExpand
Stellar mass distribution of S$^4$G disk galaxies and signatures of bar-induced secular evolution
Context. Models of galaxy formation in a cosmological framework need to be tested against observational constraints, such as the average stellar density profiles (and their dispersion) as a functionExpand
Rings and spiral arms: are they coupled with bars?.
Rings and spiral arms are distinctive features of many galaxies, and their properties are closely related to the disk dynamics. They are often associated to stellar bars, but the details of thisExpand


We present observational evidence for the inhibition of bar formation in dispersion-dominated (dynamically hot) galaxies by studying the relationship between galactic structure and host galaxyExpand
The Two-phase Formation History of Spiral Galaxies Traced by the Cosmic Evolution of the Bar Fraction
We study the evolution of galactic bars and the link with disk and spheroid formation in a sample of zoom-in cosmological simulations. Our simulation sample focuses on galaxies with present-dayExpand
Dynamics of Disks and Warps
This chapter reviews theoretical work on the stellar dynamics of galaxy disks. All the known collective global instabilities are identified, and their mechanisms described in terms of local waveExpand
Making Galaxies in a Cosmological Context: The Need for Early Stellar Feedback
We introduce the Making Galaxies in a Cosmological Context (MaGICC) program of smoothed particle hydrodynamics (SPH) simulations. We describe a parameter study of galaxy formation simulations of anExpand
The coupling between the core/cusp and missing satellite problems
We calculate the energy that baryons must inject in cold dark matter (CDM) haloes in order to remove centrally-divergent DM cusps on scales relevant to observations of dwarf spheroidal galaxiesExpand
Regular and Chaotic Dynamics
This book treats nonlinear dynamics in both Hamiltonian and dissipative systems. The emphasis is on the mechanics for generating chaotic motion, methods of calculating the transitions from regular toExpand
Order and Chaos in Dynamical Astronomy
1. Historical Introduction.- 2. Order and Chaos in General.- 3. Order and Chaos in Galaxies.- 4. Other Applications in Dynamical Astronomy.- Appendix A.- Appendix B.- Some Open Problems.- References.
ApJL, in press (arXiv:1207.2772) Pfenniger, D
  • A&A,
  • 2012
Advances in Astronomy, article id
  • MNRAS,
  • 2000