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Abstract:

We examine a Friedmann-Robertson-Walker universe filled with interacting dark matter, modified holographic Ricci dark energy (MHRDE), and a decoupled baryonic component. The estimations of the cosmic parameters with Hubble data lead to an age of the universe of 13. 17 Gyr and show that the MHRDE is free from the cosmic-age problem at low redshift (0≤z≤2) in contrast to holographic Ricci dark energy (HRDE) case. We constrain the parameters with the Union2 data set and contrast with the Hubble data. We also study the behavior of dark energy at early times by taking into account the severe bounds found at recombination era and/or at big bang nucleosynthesis. The inclusion of a non-interacting baryonic matter forces that the amount of dark energy at zt~O(1) changes abruptly implying that Ωx(z≃1100)=0. 03, so the bounds reported by the forecast of Planck and CMBPol experiments are more favored for the MHRDE model than in the case of HRDE cutoff. For the former model, we also find that at high redshift the fraction of dark energy varies from 0. 006 to 0. 002, then the amount of Ωx at the big bang nucleosynthesis era does not disturb the observed helium abundance in the universe provided that the bound Ωx(z≃1010)<0. 21 is hold. © 2013 Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica.

Registro:

Documento: Artículo
Título:Modified holographic Ricci dark energy coupled to interacting dark matter and a non-interacting baryonic component
Autor:Chimento, L.P.; Forte, M.; Richarte, M.G.
Filiación:IFIBA, CONICET, Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón I, 1428 Buenos Aires, Argentina
Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón I, 1428 Buenos Aires, Argentina
Año:2013
Volumen:73
Número:1
Página de inicio:1
Página de fin:11
DOI: http://dx.doi.org/10.1140/epjc/s10052-013-2285-1
Título revista:European Physical Journal C
Título revista abreviado:Eur. Phys. J. C
ISSN:14346044
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v73_n1_p1_Chimento

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Citas:

---------- APA ----------
Chimento, L.P., Forte, M. & Richarte, M.G. (2013) . Modified holographic Ricci dark energy coupled to interacting dark matter and a non-interacting baryonic component. European Physical Journal C, 73(1), 1-11.
http://dx.doi.org/10.1140/epjc/s10052-013-2285-1
---------- CHICAGO ----------
Chimento, L.P., Forte, M., Richarte, M.G. "Modified holographic Ricci dark energy coupled to interacting dark matter and a non-interacting baryonic component" . European Physical Journal C 73, no. 1 (2013) : 1-11.
http://dx.doi.org/10.1140/epjc/s10052-013-2285-1
---------- MLA ----------
Chimento, L.P., Forte, M., Richarte, M.G. "Modified holographic Ricci dark energy coupled to interacting dark matter and a non-interacting baryonic component" . European Physical Journal C, vol. 73, no. 1, 2013, pp. 1-11.
http://dx.doi.org/10.1140/epjc/s10052-013-2285-1
---------- VANCOUVER ----------
Chimento, L.P., Forte, M., Richarte, M.G. Modified holographic Ricci dark energy coupled to interacting dark matter and a non-interacting baryonic component. Eur. Phys. J. C. 2013;73(1):1-11.
http://dx.doi.org/10.1140/epjc/s10052-013-2285-1