Universal Journal of Physics and Application Vol. 7(2), pp. 208 - 214
DOI: 10.13189/ujpa.2013.010221
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Generalized Ghost Dark Energy Model with Varying G

Leila Yousefi¹, Ahmad Sheykhi^2,*
1 Department of Sciences, Fasa Branch, Islamic Azad University, Fasa, Iran
² Physics Department and Biruni Observatory, Shiraz University, Shiraz 71454, Iran

ABSTRACT

The cosmological implications of the generalized ghost dark energy model in the presence of varying gravitational constant are investigated. In particular, evolution of the cosmological parameters such as the equation of state and the deceleration parameters are studied. The investigation is also generalized to the more general case where there is a bulk viscosity in the cosmic fluids. It is shown that by taking , ξ=0.01 and assuming for the present time, we find and for the present ranges of the equation of state and the deceleration parameters. These values are consistent with the recent observations.

KEYWORDS
Generalized, Dark Energy, Ghost, Varying, Gravitational, Constant

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Leila Yousefi , Ahmad Sheykhi , "Generalized Ghost Dark Energy Model with Varying G," Universal Journal of Physics and Application, Vol. 7, No. 2, pp. 208 - 214, 2013. DOI: 10.13189/ujpa.2013.010221.

(b). APA Format:
Leila Yousefi , Ahmad Sheykhi (2013). Generalized Ghost Dark Energy Model with Varying G. Universal Journal of Physics and Application, 7(2), 208 - 214. DOI: 10.13189/ujpa.2013.010221.