Early dark energy constraints with late-time expansion marginalization

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorStony Brook University-
Autor(es): dc.contributorUniversity of Arizona-
Autor(es): dc.creatorRebouças, João-
Autor(es): dc.creatorGordon, Jonathan-
Autor(es): dc.creatorde Souza, Diogo H.F.-
Autor(es): dc.creatorZhong, Kunhao-
Autor(es): dc.creatorMiranda, Vivian-
Autor(es): dc.creatorRosenfeld, Rogerio-
Autor(es): dc.creatorEifler, Tim-
Autor(es): dc.creatorKrause, Elisabeth-
Data de aceite: dc.date.accessioned2025-08-21T21:53:19Z-
Data de disponibilização: dc.date.available2025-08-21T21:53:19Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-01-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1088/1475-7516/2024/02/042-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/301431-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/301431-
Descrição: dc.descriptionEarly dark energy (EDE) is an extension to the ΛCDM model that includes an additional energy density contribution near recombination. The model was proposed to reduce the tension between the measurements of the Hubble constant H0 from the cosmic microwave background (CMB) and from the local cosmic distance ladder. Some analyses in the recent literature have shown intriguing hints for EDE. However, this model increases the tension in the derived clustering of galaxies (as measured by the so-called S8 parameter) between CMB and large scale structure (LSS) measurements. This new tension limits the contribution of EDE during recombination, and thus its effect on the Hubble tension. In this work, we investigate whether the inclusion of a general, smooth late-time dark energy modification can increase back the EDE contribution when LSS data is included in the analysis. In order to generalize the late expansion with respect to the ΛCDM model, we substitute the cosmological constant by a late dark energy fluid model with a piecewise constant equation of state w(z) in redshift bins. We show that, when analysing this generalized model with combinations of CMB, LSS and type Ia supernovae data from several experiments no significant changes on S8 and EDE parameter constraints is found. The contribution to the EDE fraction constraint with late-time expansion marginalization is fEDE = 0.067+0−0.019027 using 3 redshift bins, with similar results for 5 and 10 redshift bins. This work shows that in order to solve simultaneously the Hubble and S8 tensions, one needs a mechanism for increasing the clustering of matter at late times different from a simple change in the background evolution of late dark energy.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionLaboratório Nacional de Biociências-
Descrição: dc.descriptionUnited Technologies Research Center-
Descrição: dc.descriptionNational Science Foundation of Sri Lanka-
Descrição: dc.descriptionInstituto de Física Teórica Universidade Estadual Paulista ICTP South American Institute for Fundamental Research, R. Dr. Bento Teobaldo Ferraz,, Bloco II, SP-
Descrição: dc.descriptionC. N. Yang Institute for Theoretical Physics Stony Brook University, 100 Nicolls Rd-
Descrição: dc.descriptionDepartment of Astronomy Steward Observatory University of Arizona, 933 N Cherry Ave-
Descrição: dc.descriptionDepartment of Physics University of Arizona, 1118 E Fourth Str-
Descrição: dc.descriptionInstituto de Física Teórica Universidade Estadual Paulista ICTP South American Institute for Fundamental Research, R. Dr. Bento Teobaldo Ferraz,, Bloco II, SP-
Descrição: dc.descriptionFAPESP: #2020/03756-2-
Descrição: dc.descriptionNational Science Foundation of Sri Lanka: 1531492-
Idioma: dc.languageen-
Relação: dc.relationJournal of Cosmology and Astroparticle Physics-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectcosmological parameters from CMBR-
Palavras-chave: dc.subjectcosmological parameters from LSS-
Palavras-chave: dc.subjectdark energy theory-
Título: dc.titleEarly dark energy constraints with late-time expansion marginalization-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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