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Seminar
To be or not to be: (non-)universal features in dark matter halos

Abstract

Although dark matter (DM) is an essential component for describing the observed structure of the universe, its origin and nature remain unknown. Nevertheless, theoretical studies based on numerical simulations suggest that DM halos, self-gravitating bound objects composed of DM, exhibit several distinct features, which could offer clues to discriminate between different DM models. In this talk, focusing particularly on halos in cold and fuzzy DM models, I will discuss the (non-)universal features in the inner structure of halos and present two results: (i) a newly discovered universal feature in the radial phase-space structure of CDM halos and (ii) cosmological dependence of the core structure in fuzzy DM halos that leads to a non power-law behavior in the core-halo relations.