Cosmology with Ricci-type dark energy

W. Zimdahl, J. C. Fabris, S. Del Campo, RAMON ALEJANDRO HERRERA APABLAZA

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We consider the dynamics of a cosmological substratum of pressureless matter and holographic dark energy with a cutoff length proportional to the Ricci scale. Stability requirements for the matter perturbations are shown to single out a model with a fixed relation between the present matter fraction Ω m0 and the present value ω 0 of the equation-of-state parameter of the dark energy. This model has the same number of free parameters as the ΛCDM model but it has no ΛCDM limit. We discuss the consistency between background observations and the mentioned stability-guaranteeing parameter combination.

Original languageEnglish
Title of host publicationII CosmoSur
Subtitle of host publicationCosmology and Gravitation in the Southern Cone
EditorsWinfried Zimdahl, Luis P. Chimento, Jailson Alcaniz, Saulo Carneiro, Sergio Enrique del Campo, Julio C. Fabris, Rodolfo Gambini
PublisherAmerican Institute of Physics Inc.
Pages13-18
Number of pages6
ISBN (Electronic)9780735412866
DOIs
StatePublished - 1 Jan 2015
Event2nd Cosmology and Gravitation in the Southern Cone, CosmoSur 2014 - Valparaiso, Chile
Duration: 27 May 201331 May 2013

Publication series

NameAIP Conference Proceedings
Volume1647
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference2nd Cosmology and Gravitation in the Southern Cone, CosmoSur 2014
CountryChile
CityValparaiso
Period27/05/1331/05/13

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