Cosmological Evolution in f(R,T) theory with Collisional Matter
| Autor: | Baffou, E. H., Houndjo, M. J. S., Rodrigues, M. E., Kpadonou, A. V., Tossa, J. |
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| Rok vydání: | 2015 |
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| Zdroj: | Phys.Rev. D 92 (2015) 8, 084043 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevD.92.084043 |
| Popis: | We study the evolution of the cosmological parameters, namely, the deceleration parameter $q(z)$ and the parameter of effective equation of state in a universe contains, besides the ordinary matter and dark energy, a self-interacting (collisional matter), in the generalized $f(R,T)$ theory of gravity, where $R$ and $T$ are the curvature scalar and the trace of the energy-momentum tensor, respectively. We use the generalized FRW equations the equation of continuity and obtain a differential equation of second order in $H(z)$, and solve it numerically for studying the evolution of the cosmological parameters. Two $f(R,T)$ models are considered and the results with collisional matter are compared with the ones of the $\Lambda$CDM model, and also with the model where there exists only non-collisional matter. The curves show that the models are acceptable because the values found for $w_{eff}$ are consistent with the observational data. Comment: 17 pages and 8 figues |
| Databáze: | arXiv |
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