Selecting energy–momentum trace dependent gravity theories with LSS.

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Autor(es): dc.creatorSilva, Jonas Pinheiro da-
Autor(es): dc.creatorVelten, Hermano-
Data de aceite: dc.date.accessioned2025-08-21T15:48:17Z-
Data de disponibilização: dc.date.available2025-08-21T15:48:17Z-
Data de envio: dc.date.issued2025-01-07-
Data de envio: dc.date.issued2025-01-07-
Data de envio: dc.date.issued2023-
Fonte completa do material: dc.identifierhttps://www.repositorio.ufop.br/handle/123456789/19400-
Fonte completa do material: dc.identifierhttps://www.sciencedirect.com/science/article/pii/S2212686424002103-
Fonte completa do material: dc.identifierhttps://doi.org/10.1016/j.dark.2024.101628-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1024489-
Descrição: dc.descriptionWe study scalar cosmological perturbations in 𝑓(𝑅, 𝑇 ) modified gravity theories, where 𝑇 represents the trace of the energy–momentum tensor. We provide detailed equations for the matter energy density contrast. We solve them numerically to facilitate a comparison with available large-scale structure (LSS) formation observational data on 𝑓 𝜎8, while also addressing the 𝑆8 tension. We identify 𝑓(𝑅, 𝑇 ) models that either lead to growth enhancement or suppression. Since recent results in the literature indicate a preference for the latter feature, this type of analysis is quite useful for selecting viable modifications of gravity. The studied class of such 𝑓(𝑅, 𝑇 ) models are either ruled out or severely restricted. After selecting the surviving 𝑓(𝑅, 𝑇 ) models we show how they deal with the 𝑆8 tension.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsrestrito-
Palavras-chave: dc.subjectCosmology-
Palavras-chave: dc.subjectDark energy-
Palavras-chave: dc.subjectModified gravity-
Título: dc.titleSelecting energy–momentum trace dependent gravity theories with LSS.-
Aparece nas coleções:Repositório Institucional - UFOP

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