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 nonlinear 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.
- Received 21 August 2014
DOI:https://doi.org/10.1103/PhysRevD.90.063524
© 2014 American Physical Society