Topics on bar and bulge formation and evolution
| dc.creator | Athanassoula, E. | |
| dc.date | 2008-02-01 | |
| dc.date.accessioned | 2026-07-07T09:18:16Z | |
| dc.date.available | 2026-07-07T09:18:16Z | |
| dc.description | I discuss results from the COSMOS survey, showing that the fraction of disc 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 discy bulges using N-body simulations reproducing well the properties of observed discy bulges. Thus, these simulated discy bulges have the shape of a disc, they have Sersic 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 harbour spiral structure, or an inner bar. | |
| dc.description | 4 pages, 2 figures, contributed paper to the Rome meeting on "Formation and Evolution of Galaxy Disks", eds, J. Funes, S.J. and E.M. Corsini | |
| dc.identifier | https://arxiv.org/abs/0802.0155 | |
| dc.identifier | http://arxiv.org/abs/0802.0155 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/153964 | |
| dc.subject | Astrophysics | |
| dc.title | Topics on bar and bulge formation and evolution | |
| dc.type | text |