Simulations of the formation and evolution of dwarf galaxies

Details Simulations of the formation and evolution of dwarf galaxies Simulations of the formation and evolution of dwarf galaxies

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009an....330..972v&link_type=abstract

Astronomische Nachrichten, Vol.330, Issue , p.972

Astronomy and Astrophysics

Astronomy

Galaxies: Dwarf, Galaxies: Evolution, Galaxies: Formation, Methods: N-Body Simulations

Scientific paper

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\rs{c}, broad band colour B-V, metallicity [Z/Z\sun] 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.

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