Scaling solutions from interacting fluids

Details Scaling solutions from interacting fluids Scaling solutions from interacting fluids

2000-11-21

arxiv.org/abs/gr-qc/0011073v1

Phys.Rev. D63 (2001) 083506

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

RevTeX, 21 pages, 8 figures

Scientific paper

10.1103/PhysRevD.63.083506

We examine the dynamical implications of an interaction between some of the fluid components of the universe. We consider the combination of three matter components, one of which is a perfect fluid and the other two are interacting. The interaction term generalizes the cases found in scalar field cosmologies with an exponential potential. We find that attracting scaling solutions are obtained in several regions of parameter space, that oscillating behaviour is possible, and that new curvature scaling solutions exist. We also discuss the inflationary behaviour of the solutions and present some of the constraints on the strength of the coupling, namely those arising from nucleosynthesis.

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