Serviços Personalizados
Journal
Artigo
Indicadores
- Citado por SciELO
- Acessos
Links relacionados
- Citado por Google
- Similares em SciELO
- Similares em Google
Compartilhar
Revista de Ciencias
versão impressa ISSN 0121-1935
Resumo
OLIVEROS GARCIA, Alexander. Ghost Dark Energy Model with Non-linear Interaction. rev. cienc. [online]. 2016, vol.20, n.1, pp.51-60. ISSN 0121-1935.
In this paper we study a dark energy model taking into account a non-linear interaction between the dark energy and dark matter components. The non-linear interaction term, used in this work, is proportional to the square of dark energy density. Considering a FRW type flat universe, we obtain an analytical expression for the Hubble parameter H and from this quantity, the deceleration parameter q and the equation of state parameter wΛ are analyzed. We found that, in this scenario, the accelerated expansion regime of the universe in late times is possible. However, using suitable values for the coupling constant, the square of the speed of sound remains negative, therefore, the model is unstable under small perturbations
Palavras-chave : Dark Energy; Cosmology.