Seminarium "Teoria cząstek elementarnych i kosmologia"

Galaxies are known to be good but biased tracers of the underlying dark matter field. This bias is driven mainly by the history of hierarchical clustering and galaxy/halo assembly history but is also affected by other factors regulating galaxy evolution, usually environment-dependent. Moreover, the global picture is easily blurred by observational biases unavoidably present in the data. This combination complicates modeling the relations between galaxy physical properties and the underlying dark cosmic web. At the same time, all cosmological tests are necessarily based on baryonic tracers. Thus, using galaxies for tests of cosmological models relies on our understanding of the relations between a galaxy, its DM halo, its large-scale environment, their co-evolution, and observational biases in the data we use. In my talk, I will present briefly these dependencies between galaxy evolution and their environment and challenges, I will illustrate them with recent results from our group, and discuss the prospects – and challenges – arising with (very) near-future large cosmological surveys.

slides: https://mycloud.fuw.edu.pl/index.php/s/qkfX59Ct3ctwn9B