Open AccessDisc‐like objects in hierarchical hydrodynamical simulations: comparison with observations
Author(s) -
Sáiz A.,
DomínguezTenreiro R.,
Tissera P.B.,
Courteau S.
Publication year - 2001
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2001.04391.x
Subject(s) - physics , bulge , astrophysics , spiral galaxy , spiral (railway) , disc galaxy , galaxy rotation curve , focus (optics) , galaxy , rotation (mathematics) , galaxy formation and evolution , geometry , optics , mathematical analysis , mathematics
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.