1. Galactic stellar haloes in the CDM model
- Author
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A. P. Cooper, S. Cole, C. S. Frenk, S. D. M. White, G. De Lucia, A. Helmi, A. J. Benson, J. Helly, A. Jenkins, J. Navarro, V. Springel, J. Wang, Victor P. Debattista, C. C. Popescu, Kapteyn Astronomical Institute, and Astronomy
- Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Stellar mass ,DWARF SPHEROIDAL GALAXIES ,METAL-POOR STARS ,Milky Way ,Population ,FOS: Physical sciences ,Context (language use) ,02 engineering and technology ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,methods: numerical ,Halo ,0202 electrical engineering, electronic engineering, information engineering ,galaxies: formation ,Astrophysics::Solar and Stellar Astrophysics ,Stellar structure ,education ,Astrophysics::Galaxy Astrophysics ,Dwarf galaxy ,Physics ,Numerical ,education.field_of_study ,RR LYRAE STARS ,HIERARCHICAL GALAXY FORMATION ,SURVEY COMMISSIONING DATA ,Formation ,Astronomy ,020206 networking & telecommunications ,galaxies: dwarf ,N-BODY SIMULATIONS ,Astrophysics - Astrophysics of Galaxies ,Galaxy ,Galaxy: halo ,galaxies: haloes ,COLD DARK-MATTER ,GLOBULAR-CLUSTER SYSTEM ,Astrophysics of Galaxies (astro-ph.GA) ,galaxies: structure ,DIGITAL SKY SURVEY ,MILKY-WAY SATELLITES ,020201 artificial intelligence & image processing ,Astrophysics::Earth and Planetary Astrophysics ,Dwarf ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
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, Comment: 24 pages, 19 figures; accepted for publication in MNRAS, minor changes; version with high resolution images at http://www.virgo.dur.ac.uk/aquarius
- Published
- 2010