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Article: Data-driven reconstruction of the late-time cosmic acceleration with f(T) gravity

TitleData-driven reconstruction of the late-time cosmic acceleration with f(T) gravity
Authors
KeywordsDark energy
Data-driven reconstruction
f(T) gravity
Issue Date2021
PublisherElsevier BV. The Journal's web site is located at http://www.sciencedirect.com/science/journal/22126864
Citation
Physics of the Dark Universe, 2021, v. 32, article no. 100812 How to Cite?
AbstractWe use a combination of observational data in order to reconstruct the free function of f(T) gravity in a model-independent manner. Starting from the data-driven determined dark-energy equation-of-state parameter we are able to reconstruct the f(T) form. The obtained function is consistent with the standard ΛCDM cosmology within 1σ confidence level, however the best-fit value experiences oscillatory features. We parametrize it with a sinusoidal function with only one extra parameter comparing to ΛCDM paradigm, which is a small oscillatory deviation from it, close to the best-fit curve, and inside the 1σ reconstructed region. Similar oscillatory dark-energy scenarios are known to be in good agreement with observational data, nevertheless this is the first time that such a behavior is proposed for f(T) gravity. Finally, since the reconstruction procedure is completely model-independent, the obtained data-driven reconstructed f(T) form could release the tensions between ΛCDM estimations and local measurements, such as the H0 and σ8 ones. © 2021 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/301173
ISSN
2023 Impact Factor: 5.0
2023 SCImago Journal Rankings: 1.377
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorRen, X-
dc.contributor.authorWONG, THT-
dc.contributor.authorCai, YF-
dc.contributor.authorSaridakis, EN-
dc.date.accessioned2021-07-27T08:07:11Z-
dc.date.available2021-07-27T08:07:11Z-
dc.date.issued2021-
dc.identifier.citationPhysics of the Dark Universe, 2021, v. 32, article no. 100812-
dc.identifier.issn2212-6864-
dc.identifier.urihttp://hdl.handle.net/10722/301173-
dc.description.abstractWe use a combination of observational data in order to reconstruct the free function of f(T) gravity in a model-independent manner. Starting from the data-driven determined dark-energy equation-of-state parameter we are able to reconstruct the f(T) form. The obtained function is consistent with the standard ΛCDM cosmology within 1σ confidence level, however the best-fit value experiences oscillatory features. We parametrize it with a sinusoidal function with only one extra parameter comparing to ΛCDM paradigm, which is a small oscillatory deviation from it, close to the best-fit curve, and inside the 1σ reconstructed region. Similar oscillatory dark-energy scenarios are known to be in good agreement with observational data, nevertheless this is the first time that such a behavior is proposed for f(T) gravity. Finally, since the reconstruction procedure is completely model-independent, the obtained data-driven reconstructed f(T) form could release the tensions between ΛCDM estimations and local measurements, such as the H0 and σ8 ones. © 2021 Elsevier B.V.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.sciencedirect.com/science/journal/22126864-
dc.relation.ispartofPhysics of the Dark Universe-
dc.subjectDark energy-
dc.subjectData-driven reconstruction-
dc.subjectf(T) gravity-
dc.titleData-driven reconstruction of the late-time cosmic acceleration with f(T) gravity-
dc.typeArticle-
dc.identifier.emailWONG, THT: twht@connect.hku.hk-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.dark.2021.100812-
dc.identifier.scopuseid_2-s2.0-85104127029-
dc.identifier.hkuros323484-
dc.identifier.volume32-
dc.identifier.spagearticle no. 100812-
dc.identifier.epagearticle no. 100812-
dc.identifier.isiWOS:000663215700025-
dc.publisher.placeNetherlands-

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