Disc instabilities and semi-analytic modelling of galaxy formation
Abstract
The Efstathiou, Lake and Negroponte (1982) criterion cannot distinguish bar stable from bar unstable discs and thus should not be used in semi-analytic galaxy formation simulations. I discuss the reasons for this, illustrate it with examples and point out shortcomings in the recipes used for spheroid formation. I propose an alternative, although much less straightforward, possibility.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- October 2008
- DOI:
- arXiv:
- arXiv:0808.0016
- Bibcode:
- 2008MNRAS.390L..69A
- Keywords:
-
- methods: numerical;
- galaxies: evolution;
- galaxies: haloes;
- galaxies: kinematics and dynamics;
- galaxies: structure;
- Astrophysics
- E-Print:
- 4 pages, 2 figures, accepted for publication in MNRAS Letters