English

Hubble parameter corrected interactions in cosmology

General Relativity and Quantum Cosmology 2014-04-16 v3

Abstract

In this paper we make steps in a new direction by considering fluids with EoS of more general form F(ρ,P)=0F(\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 QQ, where we accept that interaction parameter b1b_{1} (order of unity) in Q=3Hb1ρQ=3Hb_{1}\rho is time dependent and presented as a linear function of Hubble parameter HH of the form b0+btHb_{0}+btH, where bb and b0b_{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.

Keywords

Cite

@article{arxiv.1310.3421,
  title  = {Hubble parameter corrected interactions in cosmology},
  author = {J. Sadeghi and M. Khurshudyan and M. Hakobyan and H. Farahani},
  journal= {arXiv preprint arXiv:1310.3421},
  year   = {2014}
}

Comments

21 pages. Comparison with observational data added in new version

R2 v1 2026-06-22T01:45:45.855Z