Paul Sutter, University of Illinois at Urbana-Champaign

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We examine how coupled dark matter and dark energy modify the development of structure in the universe. Specifically, we study how the various effects of these theories, such as a fifth force in the dark sector and a modified particle Hubble drag, produce variations in the redshifts of caustic formation and the present-day density profiles of Zel'dovich pancakes. We compare our results in direct simulation to a perturbation theory approach for the dark energy scalar field. We also examine whether models that have been tuned to match the constraints of current observations can produce new observable effects in the nonlinear structure of the universe.

Finally, we will present results from a fully realistic three-dimensional simulation, in which we describe changes to the evolution and structure of the dark matter halo mass function.

Abstract Author(s): Paul M Sutter, Paul M Ricker