Cosmological consequences of a possible Λ-dark matter interaction

F. E. M. Costa and J. S. Alcaniz
Phys. Rev. D 81, 043506 – Published 1 February 2010

Abstract

We propose a general class of interacting models in which the interaction between the cold dark matter component and Λ is parametrized by an arbitrary function of the cosmic scale factor ϵ(a). Differently from other dynamical Λ scenarios in which the final stage of cosmic expansion is a de Sitter phase, we find solutions of transient acceleration, in which the Λ-dark matter interaction will drive the Universe to a new dark matter-dominated era in the future. We investigate some cosmological consequences of this model and discuss some constraints on its parameters from current Type Ia aupernovae, baryonic acoustic oscillations, CMB, and H0 data.

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  • Received 5 October 2009

DOI:https://doi.org/10.1103/PhysRevD.81.043506

©2010 American Physical Society

Authors & Affiliations

F. E. M. Costa* and J. S. Alcaniz

  • Observatório Nacional, 20921-400, Rio de Janeiro - RJ, Brasil

  • *ernandes@on.br
  • alcaniz@on.br

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Issue

Vol. 81, Iss. 4 — 15 February 2010

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