Barrow Entropy Cosmology: an observational approach with a hint of stability analysis

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dc.contributor.authorLeon, Genly
dc.contributor.authorMagaña, Juan
dc.contributor.authorHernández-Almada, A.
dc.contributor.authorGarcía-Aspeitia, Miguel A.
dc.contributor.authorVerdugo, Tomás
dc.contributor.authorMotta, V.
dc.date.accessioned2022-11-30T02:46:28Z
dc.date.available2022-11-30T02:46:28Z
dc.date.issued2021
dc.description.abstractIn 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 2σ 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.en_ES
dc.facultadFacultad de Cienciasen_ES
dc.file.nameLeon_Bar2021.pdf
dc.identifier.citationGenly Leon et al JCAP12(2021)032en_ES
dc.identifier.doihttps://doi.org/10.1088/1475-7516/2021/12/032
dc.identifier.urihttp://repositoriobibliotecas.uv.cl/handle/uvscl/7387
dc.languageen
dc.publisherIop Press
dc.rights© 2021 IOP Publishing Ltd and Sissa Medialab
dc.sourceJournal of Cosmology and Astroparticle Physics
dc.titleBarrow Entropy Cosmology: an observational approach with a hint of stability analysis
dc.typeArticulo
uv.departamentoInstituto de Fisica y Astronomia
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