Disc instabilities and semi-analytic modelling of galaxy formation

2008/07/31 by E. Athanassoula · 7 citations
Engineering · Physics and Astronomy · #Astronomy and Astrophysical Research #Galaxies: Formation, Evolution, Phenomena #Space Technology and Applications #astro-ph

paper · pdf · doi:10.1111/j.1745-3933.2008.00541.x

4 pages, 2 figures, accepted for publication in MNRAS Letters

arxiv created 2008/07/31 · openalex publication_date 2008/09/03 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/29

Abstract

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.

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