Viscous Cosmology
Abstract
We discuss the possibility to implement a viscous cosmological model, attributing to the dark matter component a behaviour described by bulk viscosity. Since bulk viscosity implies negative pressure, this rises the possibility to unify the dark sector. At the same time, the presence of dissipative effects may alleviate the so called small scale problems in the CDM model. While the unified viscous description for the dark sector does not lead to consistent results, the non-linear behaviour indeed improves the situation with respect to the standard cosmological model.
Keywords
Cite
@article{arxiv.1512.00921,
title = {Viscous Cosmology},
author = {C. M. S. Barbosa and J. C. Fabris and O. F. Piattella and H. E. S. Velten and W. Zimdahl},
journal= {arXiv preprint arXiv:1512.00921},
year = {2015}
}
Comments
Latex file, 7 pages, 6 figures. To appear in the proceedings of the XIIth International Conference on Gravitation, Astrophysics and Cosmology, June 28-July 5, 2015, PFUR, Moscow, Russia