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Numerical simulations of galaxy evolution in cosmological context

Published online by Cambridge University Press:  01 June 2008

Marie Martig ,
Frédéric Bournaud  and
Romain Teyssier
Marie Martig
Affiliation:
CEA, IRFU, SAp. F-91191 Gif-sur-Yvette, France Laboratoire AIM, CNRS, CEA/DSM, Université Paris Diderot. F-91191, Gif-sur-Yvette, France
Frédéric Bournaud
Affiliation:
CEA, IRFU, SAp. F-91191 Gif-sur-Yvette, France Laboratoire AIM, CNRS, CEA/DSM, Université Paris Diderot. F-91191, Gif-sur-Yvette, France
Romain Teyssier
Affiliation:
CEA, IRFU, SAp. F-91191 Gif-sur-Yvette, France Laboratoire AIM, CNRS, CEA/DSM, Université Paris Diderot. F-91191, Gif-sur-Yvette, France
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Abstract

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Large volume cosmological simulations succeed in reproducing the large-scale structure of the Universe. However, they lack resolution and may not take into account all relevant physical processes to test if the detail properties of galaxies can be explained by the CDM paradigm. On the other hand, galaxy-scale simulations could resolve this in a robust way but do not usually include a realistic cosmological context.

To study galaxy evolution in cosmological context, we use a new method that consists in coupling cosmological simulations and galactic scale simulations. For this, we record merger and gas accretion histories from cosmological simulations and re-simulate at very high resolution the evolution of baryons and dark matter within the virial radius of a target galaxy. This allows us for example to better take into account gas evolution and associated star formation, to finely study the internal evolution of galaxies and their disks in a realistic cosmological context.

We aim at obtaining a statistical view on galaxy evolution from z ≃ 2 to 0, and we present here the first results of the study: we mainly stress the importance of taking into account gas accretion along filaments to understand galaxy evolution.

Keywords

galaxies: evolutiongalaxies: interactions
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Issue S254: The Galaxy Disk in Cosmological Context , June 2008 , pp. 429 - 434
Copyright
Copyright © International Astronomical Union 2009

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