Dark radiation and dark matter coupled to holographic Ricci dark energy

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...

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Autores principales: Chimento, Luis Pascual, Richarte, Martín Gustavo
Publicado: 2013
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v73_n4_p1_Chimento
http://hdl.handle.net/20.500.12110/paper_14346044_v73_n4_p1_Chimento
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_14346044_v73_n4_p1_Chimento
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spelling paper:paper_14346044_v73_n4_p1_Chimento2023-06-08T16:14:53Z Dark radiation and dark matter coupled to holographic Ricci dark energy Chimento, Luis Pascual Richarte, Martín Gustavo 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 Ωx(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 Ωm0/Ωx0≃Ωr0/Ωx0≃O(1). © 2013 Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica. Fil:Chimento, L.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Richarte, M.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v73_n4_p1_Chimento http://hdl.handle.net/20.500.12110/paper_14346044_v73_n4_p1_Chimento
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description 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 Ωx(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 Ωm0/Ωx0≃Ωr0/Ωx0≃O(1). © 2013 Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica.
author Chimento, Luis Pascual
Richarte, Martín Gustavo
spellingShingle Chimento, Luis Pascual
Richarte, Martín Gustavo
Dark radiation and dark matter coupled to holographic Ricci dark energy
author_facet Chimento, Luis Pascual
Richarte, Martín Gustavo
author_sort Chimento, Luis Pascual
title Dark radiation and dark matter coupled to holographic Ricci dark energy
title_short Dark radiation and dark matter coupled to holographic Ricci dark energy
title_full Dark radiation and dark matter coupled to holographic Ricci dark energy
title_fullStr Dark radiation and dark matter coupled to holographic Ricci dark energy
title_full_unstemmed Dark radiation and dark matter coupled to holographic Ricci dark energy
title_sort dark radiation and dark matter coupled to holographic ricci dark energy
publishDate 2013
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v73_n4_p1_Chimento
http://hdl.handle.net/20.500.12110/paper_14346044_v73_n4_p1_Chimento
work_keys_str_mv AT chimentoluispascual darkradiationanddarkmattercoupledtoholographicriccidarkenergy
AT richartemartingustavo darkradiationanddarkmattercoupledtoholographicriccidarkenergy
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