Non-linear dark matter collapse under diffusion

Abstract

Diffusion is one of the physical processes allowed for describing the large scale dark matter dynamics. At the same time, it can be seen as a possible mechanism behind the interacting cosmologies. We study the non-linear spherical "top-hat" collapse of dark matter which undergoes velocity diffusion into a solvent dark energy field. We show constraints on the maximum magnitude allowed for the dark matter diffusion. Our results reinforce previous analysis concerning the linear perturbation theory.

6 pages, 9 figures

References in corpus (12)

• Coupled Quintessence
• Testing the Cosmic Coincidence Problem and the Nature of Dark Energy
• Scaling Cosmology
• Physical approximations for the nonlinear evolution of perturbations in dark energy scenarios
• Cosmology with matter diffusion
• A kinetic theory of diffusion in general relativity with cosmological scalar field
• Dynamical Mutation of Dark Energy
• The impact of dark energy perturbations on the growth index
• Cosmological models with fluid matter undergoing velocity diffusion
• Spherical `Top-Hat' Collapse in general Chaplygin gas dominated universes
• Spherical collapse for unified dark matter models
• Scaling cosmology with variable dark-energy equation of state

Cited by in corpus (4)

• On the implementation of the spherical collapse model for dark energy models
• Growth of matter perturbations in the extended viscous dark energy models
• Does the diffusion DM-DE interaction model solve cosmological puzzles?
• Non-linear clustering during the BEC dark matter phase transition