Bi-symmetric instabilities of the Kuz'min/Toomre disc
E. Athanassoula,J. A. Sellwood +1 more
TLDR
Etude numerique de l'influence d'un mouvement aleatoire sur les modes insrables de formation des barres of a type de disques stellaires as discussed by the authors.Abstract:
Etude numerique de l'influence d'un mouvement aleatoire sur les modes insrables de formation des barres d'un type de modeles de disques stellaires. On montre que le taux de croissance des barres est une fonction simple du mouvement aleatoire et de la masse du haloread more
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On the nature of bulges in general and of box/peanut bulges in particular: input from N-body simulations
TL;DR: In this paper, a detailed comparison of the properties of boxy and peanut bulges with those of N-body bars seen edge-on is made, and a nomenclature that can help to distinguish between the three types of bulges and avoid considerable confusion is proposed.
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What determines the strength and the slowdown rate of bars
TL;DR: In this paper, it was shown that the strength of the bar and the decrease of its pattern speed with time are set by the amount of angular momentum exchanged within the galaxy, which, in turn, is regulated by the mass distribution and the velocity dispersion of the material in the disc and spheroidal components.
Journal ArticleDOI
Dynamics of Barred Galaxies
J. A. Sellwood,Althea Wilkinson +1 more
TL;DR: In this article, the authors review the main problems presented by these complicated dynamical systems and summarize the effort so far made towards their solution, emphasizing results which appear secure, and conclude that the observed motions are consistent with material within the bar streaming along highly elongated orbits aligned with the rotating major axis.
Journal ArticleDOI
The Metamorphosis of Tidally Stirred Dwarf Galaxies
Lucio Mayer,Fabio Governato,Monica Colpi,Ben Moore,Thomas P. Quinn,James Wadsley,Joachim Stadel,Joachim Stadel,George Lake +8 more
TL;DR: In this article, high-resolution N-body/SPH (smoothed particle hydrodynamic) simulations of rotationally supported dwarf irregular galaxies moving on bound orbits in the massive dark matter halo of the Milky Way are presented.
Journal ArticleDOI
Evolution of the Bar Fraction in COSMOS: Quantifying the Assembly of the Hubble Sequence
Kartik Sheth,Debra Meloy Elmegreen,Bruce G. Elmegreen,Peter Capak,Roberto Abraham,E. Athanassoula,Richard S. Ellis,Bahram Mobasher,Mara Salvato,Eva Schinnerer,Nick Scoville,Lori Spalsbury,Linda E. Strubbe,Marcella Carollo,Michael Rich,Andrew A. West +15 more
TL;DR: The authors analyzed the redshift-dependent fraction of galactic bars over 0:2 < z < 0:84 in 2157 luminous face-on spiral galaxies from the COSMOS 2 deg 2 field.