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| Paper: |
Topics on Bar and Bulge Formation and Evolution |
| Volume: |
396, Formation and Evolution of Galaxy Disks |
| Page: |
333 |
| Authors: |
Athanassoula, E. |
| Abstract: |
I discuss results from the COSMOS survey, showing that the fraction of disk galaxies that is barred decreases considerably with look-back time from z ∼ 0.2 to z ∼ 0.8. This decrease is more important for small mass and low luminosity spirals. Classical bar formation theory provides a promising framework for understanding these results. I also discuss the formation of disky bulges using N-body simulations reproducing well the properties of observed disky bulges. Thus, these simulated disky bulges have the shape of a disk, they have Sérsic profiles with small values of the shape index and their size is of the order of a kpc. They are formed by radial inflow of material driven by the bar and are thus composed of both gas and stars and have a considerable fraction of young stars. They can harbor spiral structure, or an inner bar. |
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