Formation and evolution of bulges
E. Athanassoula (1), I. Martinez-Valpuesta (1,2) ((1) Laboratoire, d'Astrophysique de Marseille, Observatoire Astronomique de Marseille, Provence, Marseille, France, (2) Instituto de Astrofisica de Canarias,, Tenerife, Spain)
TL;DR
This paper reviews the different types of bulges in disc galaxies and discusses their formation and evolution, focusing on bar dynamics, buckling, and the impact of velocity anisotropy.
Contribution
It introduces a comprehensive classification of bulges and analyzes their formation processes and evolutionary links with bar structures in galaxies.
Findings
Coupled evolution of bar, buckling, and peanut structures.
Velocity anisotropy influences peanut bulge formation.
Bulge formation can result from bar destruction.
Abstract
After presenting three ways of defining a bulge component in disc galaxies, we introduce the various types of bulges, namely the classical bulges, the boxy/peanut bulges and the disc-like bulges. We then discuss three specific topics linked to bulge formation and evolution, namely the coupled time evolution of the bar, buckling and peanut strengths; the effect of velocity anisotropy on peanut formation; and bulge formation via bar destruction.
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Taxonomy
TopicsGear and Bearing Dynamics Analysis · Astronomy and Astrophysical Research