2001/02/15 by A. Saiz, A. Sáiz, R. Domı́nguez-Tenreiro +4 · 2 citations
Physics and Astronomy · #Astrophysics #Astrophysics and Star Formation Studies #Bulge #Disc galaxy #Focus (optics) #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy formation and evolution #Galaxy rotation curve #Geometry #Optics #Physics #Rotation (mathematics) #Scientific Research and Discoveries #Spiral (railway) #Spiral galaxy #astro-ph
paper · pdf · doi:10.1046/j.1365-8711.2001.04391.x
published as Mon.Not.Roy.Astron.Soc. 325 (2001) 119 · 22 pages, LaTeX; 14 figures; references updated. MNRAS, in press
arxiv created 2001/02/15 · openalex publication_date 2001/07/11 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present results from a careful and detailed analysis of the structural and dynamical properties of a sample of 29 disc-like objects identified at z = 0 in three AP3M-SPH fully consistent cosmological simulations. These simulations are realizations of a CDM hierarchical model, in which an inefficient Schmidt-law-like algorithm to model the stellar formation process has been implemented. We focus on properties that can be constrained with available data from observations of spiral galaxies, namely the bulge and disc structural parameters and the rotation curves. Comparison with data from Broeils, de Jong and Courteau gives satisfactory agreement, in contrast with previous findings using other codes. This suggests that the stellar formation implementation we have used has succeeded in forming compact bulges that stabilize disc-like structures in the violent phases of their assembly, while in the quiescent phases the gas has cooled and collapsed in accord with the Fall & Efstathiou standard model of disc formation.