Astro Seminar: "Dark Matter Clustering in the Dissipationless Limit"

Wed, 03/28/2018 - 14:00
Michael Joyce (Sorbonne Université, Paris)

An accurate description and understanding of matter clustering in the strongly non-linear regime, even neglecting baryonic physics, remains a problem which is relevant to cosmology and of fundamental interest. My talk will be structured around three questions about it: (1) How well do current simulations resolve this clustering? (2) Is the so-called "stable clustering" approximation a relevant one? (3) Are there really "universal" properties of non-linear clustering? I will report results addressing these questions using mostly simulations of so-called "scale-free" cosmological models. They both show that these questions are closely linked to one another, and provide some answers which future studies of this kind should be able to refine.

David Rittenhouse Laboratory, A4