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Dark radiation and dark matter coupled to holographic Ricci dark energy

  • Luis P. Chimento
  • Martín G. RicharteEmail author
Regular Article - Theoretical Physics

Abstract

We investigate a universe filled with interacting dark matter, holographic dark energy, and dark radiation for the spatially flat Friedmann–Robertson–Walker (FRW) spacetime. We use a linear interaction to reconstruct all the component energy densities in terms of the scale factor by directly solving the balance’s equations along with the source equation. We apply the χ 2 method to the observational Hubble data for constraining the cosmic parameters, contrast with the Union 2 sample of supernovae, and analyze the amount of dark energy in the radiation era. It turns out that our model exhibits an excess of dark energy in the recombination era whereas the stringent bound Ω x (z≃1010)<0.21 at big-bang nucleosynthesis is fulfilled. We find that the interaction provides a physical mechanism for alleviating the triple cosmic coincidence and this leads to \(\varOmega_{m0}/\varOmega_{x0} \simeq\varOmega_{r0}/\varOmega_{x0} \simeq\mathcal{O}(1)\).

Keywords

Dark Matter Dark Energy Holographic Dark Energy Dark Sector Dark Radiation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

L.P.C. thanks the University of Buenos Aires under Project No. 20020100100147 and the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) under Project PIP 114-200801-00328 for the partial support of this work during their different stages. M.G.R. is partially supported by Postdoctoral Fellowship programme of CONICET.

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Copyright information

© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica 2013

Authors and Affiliations

  1. 1.Departamento de Física, Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos Aires and IFIBA, CONICETBuenos AiresArgentina

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