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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
physics and astronomy
Barrow Entropy Cosmology: An observational approach with a hint of stability analysis
Journal of Cosmology and Astroparticle Physics, Volume 2021, No. 12, Article 032, Year 2021
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Description
In this work, we use an observational approach and dynamical system analysis to study the cosmological model recently proposed by Saridakis (2020), which is based on the modification of the entropy-area black hole relation proposed by Barrow (2020). The Friedmann equations governing the dynamics of the Universe under this entropy modification can be calculated through the gravity-thermodynamics conjecture. We investigate two models, one considering only a matter component and the other including matter and radiation, which have new terms compared to the standard model sourcing the late cosmic acceleration. A Bayesian analysis is performed in which using five cosmological observations (observational Hubble data, type Ia supernovae, HII galaxies, strong lensing systems, and baryon acoustic oscillations) to constrain the free parameters of both models. From a joint analysis, we obtain constraints that are consistent with the standard cosmological paradigm within 2s confidence level. In addition, a complementary dynamical system analysis using local and global variables is developed which allows obtaining a qualitative description of the cosmology. As expected, we found that the dynamical equations have a de Sitter solution at late times. © 2021 IOP Publishing Ltd and Sissa Medialab.
Authors & Co-Authors
León, Genly
Chile, Antofagasta
Universidad Católica Del Norte
Magaña, Juan Aldebarán
Chile, Santiago
Pontificia Universidad Católica de Chile
Hernandez-Almada, A.
Mexico, Queretaro
Universidad Autónoma de Querétaro
García-Aspeitia, Miguel Ángel
Mexico, Zacatecas
Universidad Autónoma de Zacatecas
Mexico, Mexico
Consejo Nacional de Humanidades, Ciencias y Tecnologías
Verdugo, T.
Mexico, Mexico
Universidad Nacional Autónoma de México
Motta, Verónica
Chile, Valparaiso
Universidad de Valparaiso
Statistics
Citations: 24
Authors: 6
Affiliations: 7
Identifiers
Doi:
10.1088/1475-7516/2021/12/032
ISSN:
14757516
Research Areas
Cancer
Study Approach
Qualitative