Evolution of the Milky Way halo by accretion of dwarf satellite galaxies

Details Evolution of the Milky Way halo by accretion of dwarf satellite galaxies Evolution of the Milky Way halo by accretion of dwarf satellite galaxies

2011-03-06

arxiv.org/abs/1103.1121v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

3 pages, 2 figures, to appear in the proceedings of the CRAL conference, Lyon, June 2010, "A Universe of Dwarf Galaxies", eds.

Scientific paper

Within the Cold Dark Matter scenario the hierarchical merging paradigm is the natural result to form massive galactic halos by the minor mergers of sub-halos and, by this, inherently their stellar halo. Although this must be also invoked for the Milky Way, the context of chemical and kinematic coherence of halo stars and dwarf spheroidal galaxies is yet unsolved a focus of present-day research. To examine this issue we model the chemo-dynamical evolution of the system of satellites selected from the cosmological Via Lactea II simulations to be similar for the Milky Way environment but at an early epoch.

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