Bulk viscous cosmology: unified dark matter
Cosmology and Nongalactic Astrophysics
2015-05-20 v1
Abstract
The bulk viscosity is introduced to model unified dark matter. The viscous unified model assumes the universe is filled with a single fluid with the bulk viscosity. We review the general framework of the viscous cosmology. The Hubble parameter has a direct connection with the bulk viscosity coefficient. For concrete form of the bulk viscosity, the Hubble parameter which has the scaling relation with the redshift can be obtained. We discuss two viscosity models and the cosmological evolution to which they lead. Using SNe Ia data, the viscosity model can be fitted. We briefly review the fitting method here.
Keywords
Cite
@article{arxiv.1012.3045,
title = {Bulk viscous cosmology: unified dark matter},
author = {Xu Dou and Xin-He Meng},
journal= {arXiv preprint arXiv:1012.3045},
year = {2015}
}
Comments
Review in the Advances in Astronomy focus issue on Dark Matter; 11 pages, 1 figure