Galactic stellar haloes in the CDM model

Details Galactic stellar haloes in the CDM model Galactic stellar haloes in the CDM model

2009-10-19

arxiv.org/abs/0910.3211v2

Mon.Not.Roy.Astron.Soc.406:744-766,2010

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

24 pages, 19 figures; accepted for publication in MNRAS, minor changes; version with high resolution images at http://www.vi

Scientific paper

10.1111/j.1365-2966.2010.16740.x

We present six simulations of galactic stellar haloes formed by the tidal disruption of accreted dwarf galaxies in a fully cosmological setting. Our model is based on the Aquarius project, a suite of high resolution N-body simulations of individual dark matter haloes. We tag subsets of particles in these simulations with stellar populations predicted by the Galform semi-analytic model. Our method self-consistently tracks the dynamical evolution and disruption of satellites from high redshift. The luminosity function and structural properties of surviving satellites, which agree well with observations, suggest that this technique is appropriate. We find that accreted stellar haloes are assembled between 1

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