How Halo Concentration Impacts Subhalo Abundance and the Galaxy-halo Connection

Tue, October 13, 2015

Cosmology seminar event image

The existence of dark matter substructures is one of the most distinct predictions of the cold dark matter model, and the relation between dark matter substructures and satellite galaxies is one of the most critical questions about galaxy formation. We address some aspects of these theoretical questions with new suites of cosmological simulations and zoom-in simulations of Milky Way-mass halos. In this talk, I will discuss how to model the abundance abundance function to account for its dependence on the halo formation history. I will also
discuss how to parametrize and to constrain the concentration dependence in the galaxy-halo connection under the framework of abundance matching, and the implications of this new parameter.