The relation between low-metallicity stellar halo and the dark matter halo in LCDM

PATRICIA B. TISSERA

Workshop; Satellites and Streams in Santiago 2015; 2015

The current cosmological paradigm postulates that galaxies assembled hierarchically by the aggregation of smaller systems.The formation history of galaxies such as the Milky Way involves infall, mergers and interactions with different relative importance probably modulated by the global environment where they inhabit.These mechanisms might leave fingerprints or signatures in the stellar populations which could provide insight in their history of formation. In particular, chemo-dynamical patterns are a challenging route to confront models and observations. State-of-art cosmological codes include chemo-dynamical schemes which allow the description of the non-linear evolution of the structure together with the chemical enrichment of baryons. These models are powerful tools to understand observations in the near and high redshift universe within the current cosmological framework.In this talk, I will summarize results related to the assembly of stellar haloes, the chemical properties of stellar populations forming insitu and in accreted satellites and the relation between the stellar and dark matter haloes.