Crossing the phantom divide in an interacting generalized Chaplygin gas

Unified generalized Chaplygin gas models assuming an interaction between dark energy and dark matter fluids have been previously proposed. Following these ideas, we consider a particular relation between dark densities, which allows the possibility of a time varying equation of state for dark energy that crosses the phantom divide at a recent epoch. Moreover, these densities decay during all the evolution of the Universe, avoiding a Big Rip. We find also a scaling solution, i.e. these densities are asymptotically proportional in the future, which contributes to the solution of the coincidence problem.

98.65.Es
95.36.+x
98.80.-k
dark energy: equation of state
gas: Chaplygin
dark energy: density
membrane model
scaling
Randall-Sundrum model
dark matter: density

References(0)

Figures(0)

Loading ...