Unifying inflation with early and late dark energy epochs in axion F(R) gravity

We provide a theoretical model of F(R) gravity in which it is possible to describe in a unified way inflation, an early and a late dark energy era, in the presence of a light axion particle which plays the role of the dark matter component of the Universe. Particularly, the early time phenomenology...

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Detalles Bibliográficos
Autor: Oikonomou, Vasilis K.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/237563
Acceso en línea:http://hdl.handle.net/10261/237563
Access Level:acceso abierto
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spelling Unifying inflation with early and late dark energy epochs in axion F(R) gravityOikonomou, Vasilis K.We provide a theoretical model of F(R) gravity in which it is possible to describe in a unified way inflation, an early and a late dark energy era, in the presence of a light axion particle which plays the role of the dark matter component of the Universe. Particularly, the early time phenomenology is dominated by an R2 term, while the presence of the other terms f(R) ensure the occurrence of the early and late-time dark energy eras. The inflationary phenomenology is compatible with the Planck 2018 data for inflation, while the late-time dark energy era is compatible with the Planck 2018 constraints on the cosmological parameters. Also, the model exhibits an early dark energy era, at z∼2.5 approximately, followed by a deceleration era, which starts at approximately z∼1.5, which in turn is followed by a late-time dark energy era for redshifts z∼0.5, which lasts for approximately 5 billion years up to present time. A notable feature of our model is that the dark energy era is free from dark energy oscillations, at least in the redshift interval z=[0,10]. In addition, we also discuss several features related to observational data at z∼2.34, at which redshift intricate observational data exist in the literature. Moreover, the numerical code for the dark energy phenomenology, written in python3, is presented in the end of the article. Finally, the model has another interesting characteristic, a sudden jump of the value of the Hubble rate in the redshift interval z∼[2,2.6] where its value suddenly increases and then decreases until z∼0.Peer reviewedAmerican Physical SocietyConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202120212021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/237563reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1103/PhysRevD.103.044036Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2375632026-05-22T06:33:51Z
dc.title.none.fl_str_mv Unifying inflation with early and late dark energy epochs in axion F(R) gravity
title Unifying inflation with early and late dark energy epochs in axion F(R) gravity
spellingShingle Unifying inflation with early and late dark energy epochs in axion F(R) gravity
Oikonomou, Vasilis K.
title_short Unifying inflation with early and late dark energy epochs in axion F(R) gravity
title_full Unifying inflation with early and late dark energy epochs in axion F(R) gravity
title_fullStr Unifying inflation with early and late dark energy epochs in axion F(R) gravity
title_full_unstemmed Unifying inflation with early and late dark energy epochs in axion F(R) gravity
title_sort Unifying inflation with early and late dark energy epochs in axion F(R) gravity
dc.creator.none.fl_str_mv Oikonomou, Vasilis K.
author Oikonomou, Vasilis K.
author_facet Oikonomou, Vasilis K.
author_role author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description We provide a theoretical model of F(R) gravity in which it is possible to describe in a unified way inflation, an early and a late dark energy era, in the presence of a light axion particle which plays the role of the dark matter component of the Universe. Particularly, the early time phenomenology is dominated by an R2 term, while the presence of the other terms f(R) ensure the occurrence of the early and late-time dark energy eras. The inflationary phenomenology is compatible with the Planck 2018 data for inflation, while the late-time dark energy era is compatible with the Planck 2018 constraints on the cosmological parameters. Also, the model exhibits an early dark energy era, at z∼2.5 approximately, followed by a deceleration era, which starts at approximately z∼1.5, which in turn is followed by a late-time dark energy era for redshifts z∼0.5, which lasts for approximately 5 billion years up to present time. A notable feature of our model is that the dark energy era is free from dark energy oscillations, at least in the redshift interval z=[0,10]. In addition, we also discuss several features related to observational data at z∼2.34, at which redshift intricate observational data exist in the literature. Moreover, the numerical code for the dark energy phenomenology, written in python3, is presented in the end of the article. Finally, the model has another interesting characteristic, a sudden jump of the value of the Hubble rate in the redshift interval z∼[2,2.6] where its value suddenly increases and then decreases until z∼0.
publishDate 2021
dc.date.none.fl_str_mv 2021
2021
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/237563
url http://hdl.handle.net/10261/237563
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1103/PhysRevD.103.044036
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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