Dynamics and statefinder analysis of a class of sign-changeable interacting dark energy scenarios
Abstract We revise the dynamical properties of a class of cosmological models where the dark sector interacts through an interacting term that changes sign during evolution. In particular, we obtain the critical points and investigate the existence and stability conditions for cosmological solutions...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-10-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-022-10898-6 |
| _version_ | 1811192422317686784 |
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| author | Fabiola Arévalo Antonella Cid |
| author_facet | Fabiola Arévalo Antonella Cid |
| author_sort | Fabiola Arévalo |
| collection | DOAJ |
| description | Abstract We revise the dynamical properties of a class of cosmological models where the dark sector interacts through an interacting term that changes sign during evolution. In particular, we obtain the critical points and investigate the existence and stability conditions for cosmological solutions, describing radiation, matter and dark energy dominated eras. We find that all the studied models admit a stable critical point corresponding to an accelerated phase. We use background data to find the best fit parameters for one of the studied models, resulting in an interacting parameter with a definite sign within the $$1\sigma $$ 1 σ confidence level, consistent with the results of the dynamical system analysis. We compute the statefinder parameters and plot the $$r-q$$ r - q and $$r-s$$ r - s planes, where we observe different evolutionary trajectories for the interacting scenarios, allowing in this sense to discriminate among dark energy models. |
| first_indexed | 2024-04-11T23:52:29Z |
| format | Article |
| id | doaj.art-f378f12944474d65b3918c6e3fc2e53f |
| institution | Directory Open Access Journal |
| issn | 1434-6052 |
| language | English |
| last_indexed | 2024-04-11T23:52:29Z |
| publishDate | 2022-10-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-f378f12944474d65b3918c6e3fc2e53f2022-12-22T03:56:27ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522022-10-01821011410.1140/epjc/s10052-022-10898-6Dynamics and statefinder analysis of a class of sign-changeable interacting dark energy scenariosFabiola Arévalo0Antonella Cid1Núcleo de Matemática, Física y Estadística, Universidad MayorDepartamento de Física, Universidad del Bío-BíoAbstract We revise the dynamical properties of a class of cosmological models where the dark sector interacts through an interacting term that changes sign during evolution. In particular, we obtain the critical points and investigate the existence and stability conditions for cosmological solutions, describing radiation, matter and dark energy dominated eras. We find that all the studied models admit a stable critical point corresponding to an accelerated phase. We use background data to find the best fit parameters for one of the studied models, resulting in an interacting parameter with a definite sign within the $$1\sigma $$ 1 σ confidence level, consistent with the results of the dynamical system analysis. We compute the statefinder parameters and plot the $$r-q$$ r - q and $$r-s$$ r - s planes, where we observe different evolutionary trajectories for the interacting scenarios, allowing in this sense to discriminate among dark energy models.https://doi.org/10.1140/epjc/s10052-022-10898-6 |
| spellingShingle | Fabiola Arévalo Antonella Cid Dynamics and statefinder analysis of a class of sign-changeable interacting dark energy scenarios European Physical Journal C: Particles and Fields |
| title | Dynamics and statefinder analysis of a class of sign-changeable interacting dark energy scenarios |
| title_full | Dynamics and statefinder analysis of a class of sign-changeable interacting dark energy scenarios |
| title_fullStr | Dynamics and statefinder analysis of a class of sign-changeable interacting dark energy scenarios |
| title_full_unstemmed | Dynamics and statefinder analysis of a class of sign-changeable interacting dark energy scenarios |
| title_short | Dynamics and statefinder analysis of a class of sign-changeable interacting dark energy scenarios |
| title_sort | dynamics and statefinder analysis of a class of sign changeable interacting dark energy scenarios |
| url | https://doi.org/10.1140/epjc/s10052-022-10898-6 |
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