Galaxy Dynamics: Secular Evolution and Accretion
Francoise Combes (LERMA, Obs-Paris)
TL;DR
This paper reviews recent advances in galaxy dynamics, focusing on secular evolution, gas accretion, and minor mergers, and discusses their implications for galaxy structure and evolution.
Contribution
It synthesizes recent findings on galaxy dynamics, highlighting the roles of secular processes and accretion in shaping galaxy evolution.
Findings
Gas radial flows influence galaxy metallicity gradients
Minor mergers contribute to bulge formation and galaxy morphology
Resonant scattering affects stellar radial migration
Abstract
Recent results are reviewed on galaxy dynamics, bar evolution, destruction and re-formation, cold gas accretion, gas radial flows and AGN fueling, minor mergers. Some problems of galaxy evolution are discussed in particular, exchange of angular momentum, radial migration through resonant scattering, and consequences on abundance gradients, the frequency of bulgeless galaxies, and the relative role of secular evolution and hierarchical formation.
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