Can dark matter–dark energy interaction alleviate the cosmic coincidence problem?
dc.contributor.author | Jesus, J. F. [UNESP] | |
dc.contributor.author | Escobal, A. A. [UNESP] | |
dc.contributor.author | Benndorf, D. [UNESP] | |
dc.contributor.author | Pereira, S. H. [UNESP] | |
dc.contributor.institution | Universidade Estadual Paulista (UNESP) | |
dc.date.accessioned | 2022-04-29T08:41:25Z | |
dc.date.available | 2022-04-29T08:41:25Z | |
dc.date.issued | 2022-03-01 | |
dc.description.abstract | In this paper we study a model of interacting dark energy–dark matter where the ratio between these components is not constant, changing from early to late times in such a way that the model can solve or alleviate the cosmic coincidence problem (CP). The interaction arises from an assumed relation of the form ρx∝ρdα, where ρx and ρd are the energy densities of dark energy and dark matter components, respectively, and α is a free parameter. For a dark energy equation of state parameter w= - 1 we found that, if α= 0 , the standard Λ CDM model is recovered, where the coincidence problem is unsolved. For 0 < α< 1 , the CP would be alleviated and for α∼ 1 , the CP would be solved. The dark energy component is analyzed with both w= - 1 and w≠ - 1. Using Supernovae type Ia and Hubble parameter data constraints, in the case w= - 1 we find α=0.109-0.072+0.062 at 68% C.L., and the CP is alleviated. For w≠ - 1 , a degeneracy arises on the w–α plane. In order to break such degeneracy we add cosmic microwave background distance priors and baryonic acoustic oscillations data to the constraints, yielding α= - 0.075 ± 0.046 at 68% C.L. In this case we find that the CP is not alleviated even for 2σ interval for α. Furthermore, this last model is discarded against flat Λ CDM according to BIC analysis. | en |
dc.description.affiliation | Instituto de Ciências e Engenharia Universidade Estadual Paulista (UNESP), R. Geraldo Alckmin 519, SP | |
dc.description.affiliation | Departamento de Física Faculdade de Engenharia de Guaratinguetá Universidade Estadual Paulista (UNESP), Av. Dr. Ariberto Pereira da Cunha 333, SP | |
dc.description.affiliationUnesp | Instituto de Ciências e Engenharia Universidade Estadual Paulista (UNESP), R. Geraldo Alckmin 519, SP | |
dc.description.affiliationUnesp | Departamento de Física Faculdade de Engenharia de Guaratinguetá Universidade Estadual Paulista (UNESP), Av. Dr. Ariberto Pereira da Cunha 333, SP | |
dc.identifier | http://dx.doi.org/10.1140/epjc/s10052-022-10234-y | |
dc.identifier.citation | European Physical Journal C, v. 82, n. 3, 2022. | |
dc.identifier.doi | 10.1140/epjc/s10052-022-10234-y | |
dc.identifier.issn | 1434-6052 | |
dc.identifier.issn | 1434-6044 | |
dc.identifier.scopus | 2-s2.0-85127416496 | |
dc.identifier.uri | http://hdl.handle.net/11449/230664 | |
dc.language.iso | eng | |
dc.relation.ispartof | European Physical Journal C | |
dc.source | Scopus | |
dc.title | Can dark matter–dark energy interaction alleviate the cosmic coincidence problem? | en |
dc.type | Artigo | |
unesp.department | Física e Química - FEG | pt |