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| Paper: |
Origin and Evolution of Structure and Nucleosynthesis for Galaxies in the Local Group |
| Volume: |
458, Galactic Archaeology: Near-Field Cosmology and the Formation of the Milky Way |
| Page: |
261 |
| Authors: |
Mathews, G. J.; Zhao, X.; Lan, N. Q. |
| Abstract: |
The Milky Way is the product of a complex evolution of generations of merges, collapse, star formation, supernova and collisional heating, radiative and collisional cooling, and ejected nucleosynthesis. Moreover, all of this occurs in the context of the cosmic expansion, the formation of cosmic filaments, dark-matter halos, spiral density waves, and emerging dark energy. In this paper we discuss recent calculations of the formation and evolution of galaxies and Local-Group like systems derived from simulations of large scale structure. Specifically, we describe simulations of poor clusters like our Local group that contain two large spirals presently separated by ∼ 800 kpc. In these systems there is a tendency for galactic halos to form within the dark matter filaments that define a super-galactic plane. Gravitational interaction along this structure leads to streaming flows toward the two dominant galaxies in the cluster. These simulations also suggest that a significant fraction of the Galactic halo formed as at large distances and then arrived later along these streaming flows. |
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