2 papers
astro-ph2005
Bulk viscosity driving the acceleration of the Universe
J. C. Fabris, S. V. B. Goncalves, R. de Sa Ribeiro
The possibility that the present acceleration of the universe is driven by a kind of viscous fluid is exploited. At background level this model is similar to the generalized Chaply…
astro-ph2003
Generalized Chaplygin gas with and the cosmological model
J. C. Fabris, S. V. B. Gonçalves, R. de Sá Ribeiro
The generalized Chaplygin gas model is characterized by the equation of state . It is generally stated that the case is equivalent to a model with cosmo…