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Hubble parameter corrected interactions in cosmology

Authors :
Sadeghi, J.
Khurshudyan, M.
Hakobyan, M.
Farahani, H.
Source :
Advances in High Energy Physics Volume 2014 (2014), Article ID 129085, 16 pages
Publication Year :
2013

Abstract

In this paper we make steps in a new direction by considering fluids with EoS of more general form $F(\rho,P)=0$. It is thought that there should be interaction between cosmic fluids, but this assumption for this stage carries only phenomenological character opening a room for different kind of manipulations. In this article we will consider a modification of an interaction $Q$, where we accept that interaction parameter $b_{1}$ (order of unity) in $Q=3Hb_{1}\rho$ is time dependent and presented as a linear function of Hubble parameter $H$ of the form $b_{0}+btH$, where $b$ and $b_{0}$ are constants. We consider two different models include modified Chaplygin gas and palotropic gas which have bulk viscosity. Then, we investigate problem numerically and analyze behavior of different cosmological parameters concerning to fluids and behavior of Universe.<br />Comment: 21 pages. Comparison with observational data added in new version

Details

Database :
arXiv
Journal :
Advances in High Energy Physics Volume 2014 (2014), Article ID 129085, 16 pages
Publication Type :
Report
Accession number :
edsarx.1310.3421
Document Type :
Working Paper