Physical constraints on interacting dark energy models
Abstract Physical limits on the equation-of-state (EoS) parameter of a dark energy component non-minimally coupled with the dark matter field are examined in light of the second law of thermodynamics and the positiveness of entropy. Such constraints are combined with observational data sets of type...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-09-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-018-6212-3 |
| _version_ | 1818596265772974080 |
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| author | J. E. Gonzalez H. H. B. Silva R. Silva J. S. Alcaniz |
| author_facet | J. E. Gonzalez H. H. B. Silva R. Silva J. S. Alcaniz |
| author_sort | J. E. Gonzalez |
| collection | DOAJ |
| description | Abstract Physical limits on the equation-of-state (EoS) parameter of a dark energy component non-minimally coupled with the dark matter field are examined in light of the second law of thermodynamics and the positiveness of entropy. Such constraints are combined with observational data sets of type Ia supernovae, baryon acoustic oscillations and the angular acoustic scale of the cosmic microwave background to impose restrictions on the behaviour of the dark matter/dark energy interaction. Considering two EoS parameterisations of the type $$w = w_0 + w_a\zeta (z)$$ w=w0+waζ(z) , we derive a general expression for the evolution of the dark energy density and show that the combination of thermodynamic limits and observational data provide tight bounds on the $$w_0 - w_a$$ w0-wa parameter space. |
| first_indexed | 2024-12-16T11:29:10Z |
| format | Article |
| id | doaj.art-8b04f35a9a2445f7acac46a25b824d3a |
| institution | Directory Open Access Journal |
| issn | 1434-6044 1434-6052 |
| language | English |
| last_indexed | 2024-12-16T11:29:10Z |
| publishDate | 2018-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-8b04f35a9a2445f7acac46a25b824d3a2022-12-21T22:33:17ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522018-09-017891810.1140/epjc/s10052-018-6212-3Physical constraints on interacting dark energy modelsJ. E. Gonzalez0H. H. B. Silva1R. Silva2J. S. Alcaniz3Departamento de Física, Universidade Federal de SergipeUniversidade Federal de Campina GrandeDepartamento de Física, Universidade Federal do Rio Grande do NorteObservatório NacionalAbstract Physical limits on the equation-of-state (EoS) parameter of a dark energy component non-minimally coupled with the dark matter field are examined in light of the second law of thermodynamics and the positiveness of entropy. Such constraints are combined with observational data sets of type Ia supernovae, baryon acoustic oscillations and the angular acoustic scale of the cosmic microwave background to impose restrictions on the behaviour of the dark matter/dark energy interaction. Considering two EoS parameterisations of the type $$w = w_0 + w_a\zeta (z)$$ w=w0+waζ(z) , we derive a general expression for the evolution of the dark energy density and show that the combination of thermodynamic limits and observational data provide tight bounds on the $$w_0 - w_a$$ w0-wa parameter space.http://link.springer.com/article/10.1140/epjc/s10052-018-6212-3 |
| spellingShingle | J. E. Gonzalez H. H. B. Silva R. Silva J. S. Alcaniz Physical constraints on interacting dark energy models European Physical Journal C: Particles and Fields |
| title | Physical constraints on interacting dark energy models |
| title_full | Physical constraints on interacting dark energy models |
| title_fullStr | Physical constraints on interacting dark energy models |
| title_full_unstemmed | Physical constraints on interacting dark energy models |
| title_short | Physical constraints on interacting dark energy models |
| title_sort | physical constraints on interacting dark energy models |
| url | http://link.springer.com/article/10.1140/epjc/s10052-018-6212-3 |
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