Disc instabilities and semi-analytic modelling of galaxy formation
arXiv:0808.0016 · doi:10.1111/j.1745-3933.2008.00541.x
Abstract
The Efstathiou, Lake and Negroponte (1982) criterion can not 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.
4 pages, 2 figures, accepted for publication in MNRAS Letters