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Simulations of the formation and evolution of dwarf galaxies
Author(s) -
Valcke S.,
De Rijcke S.,
Dejonghe H.
Publication year - 2009
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.200911255
Subject(s) - physics , astrophysics , surface brightness , dwarf galaxy , galaxy , luminosity , metallicity , dark matter , fundamental plane (elliptical galaxies) , halo , dwarf galaxy problem , dwarf spheroidal galaxy , radius , velocity dispersion , astronomy , dark matter halo , galaxy formation and evolution , disc galaxy , interacting galaxy , computer science , computer security
We present models of the formation and evolution of isolated dwarf galaxies. The models follow the evolution of an initially homogeneous gas cloud collapsing in a pre‐existing dark‐matter halo. These simplified initial conditions are supported by the merger trees of isolated dwarf galaxies extracted from the milli‐Millennium Simulation. An extensive comparison of the models to observations was made. The models' surface brightness profiles are well fitted by Sérsic profiles and the correlations between the models' Sérsic parameters and luminosity agree with the observations. We have also compared model predictions for the half‐light radius R e , central velocity dispersion σ c , broad band colour B – V , metallicity [ Z/Z ⊙ ] versus luminosity relations and for the location relative to the fundamental plane with the available data. In all cases the models give the correct slope, in most cases we also get the zero‐point right (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)