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Cosmic slowing down of acceleration with the Chaplygin-Jacobi gas as a dark fluid?
Indexado
WoS WOS:001445784400011
Scopus SCOPUS_ID:105000349147
DOI 10.1140/EPJC/S10052-025-13996-3
Año 2025
Tipo artículo de investigación

Citas Totales

Autores Afiliación Chile

Instituciones Chile

% Participación
Internacional

Autores
Afiliación Extranjera

Instituciones
Extranjeras


Abstract



A particular generalization of the Chaplygin inflationary model, using the formalism of Hamilton-Jacobi and elliptic functions, results in a more general non-linear Chaplygin-type equation of state (Chaplygin-Jacobi model). We investigate the implementation of this model as a dark energy (DE) fluid to explain the recent acceleration of the universe. Unlike Lambda\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Lambda $$\end{document}CDM and other Chaplygin-like fluids, where the final fate of the universe is an eternal de Sitter (dS) phase, the dynamics of this model allows for the possibility of a decelerating phase in the future, following the current accelerating phase. In other words, a transient acceleration arises, accounting for the recently claimed slowing down phenomenon. This Chaplygin-Jacobi model shows important differences compared to the standard and generalized Chaplygin gas models. Additionally, we perform a Markov Chain Monte Carlo (MCMC) analysis using several datasets, including type Ia supernovae (SNIa), cosmic chronometers (CC), fast radio bursts (FRBs), and Baryon acoustic oscillations (BAO) to examine the observational viability of the model. Our results indicate that, although a transient phase of accelerated expansion is supported by current observations in the context of the Chaplygin-Jacobi model, this model is strongly disfavored in comparison with Lambda\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Lambda $$\end{document}CDM.

Revista



Revista ISSN
European Physical Journal C 1434-6044

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Disciplinas de Investigación



WOS
Physics, Particles & Fields
Scopus
Sin Disciplinas
SciELO
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Publicaciones WoS (Ediciones: ISSHP, ISTP, AHCI, SSCI, SCI), Scopus, SciELO Chile.

Colaboración Institucional



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Autores - Afiliación



Ord. Autor Género Institución - País
1 Fortunato, J. A. S. - Univ Fed Espirito Santo - Brasil
Inst Argentino Radioastron - Argentina
Universidade Federal do Espírito Santo - Brasil
Instituto Argentino de Radioastronomia - Argentina
2 Hipolito-Ricaldi, W. S. - Univ Fed Espirito Santo - Brasil
Universidade Federal do Espírito Santo - Brasil
3 Videla, N. - Pontificia Universidad Católica de Valparaíso - Chile
4 Villanueva, J. R. - Universidad de Valparaíso - Chile

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Financiamiento



Fuente
FONDECYT
Fondo Nacional de Desarrollo Científico y Tecnológico
FAPES
Fundação de Amparo à Pesquisa e Inovação do Espírito Santo
Centro de Física Teórica de Valparaíso
Instituto Argentino de Radioastronomía
Centro de Fisica Teorica de Valparaiso (CeFiTeV)

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Agradecimientos



Agradecimiento
J.A.S.F. thanks FAPES for the fellowship and financial support (045/2024 - P: 2024-M88VK). Also, J.A.S.F. is grateful for the hospitality of the Instituto Argentino de Radioastronomia (IAR), where part of this work was carried out. W.S.H.R. thanks FAPES (PRONEM No 503/2020) for the financial support under which this work was carried out. N. V. acknowledges the financial support of Fondecyt Grant 1220065. J. R. V. is partially supported by Centro de Fisica Teorica de Valparaiso (CeFiTeV). N. V. and J. R. V. thank the CEUNES/UFES for their warm hospitality while some of this work was carried out.
J.A.S.F. thanks FAPES for the fellowship and financial support (045/2024 - P: 2024-M88VK). Also, J.A.S.F. is grateful for the hospitality of the Instituto Argentino de Radioastronomia (IAR), where part of this work was carried out. W.S.H.R. thanks FAPES (PRONEM No 503/2020) for the financial support under which this work was carried out. N. V. acknowledges the financial support of Fondecyt Grant 1220065. J. R. V. is partially supported by Centro de F\u00EDsica Te\u00F3rica de Valpara\u00EDso (CeFiTeV). N. V. and J. R. V. thank the CEUNES/UFES for their warm hospitality while some of this work was carried out.

Muestra la fuente de financiamiento declarada en la publicación.