Orfeu Bertolami

Generalized Chaplygin gas, accelerated expansion and dark energy matter unification

We consider the scenario emerging from the dynamics of a generalized

Extra force in f(R) modified theories of gravity

d

Nonminimal coupling and quintessence

-brane in a

Dark energy–dark matter interaction and putative violation of the equivalence principle from the Abell cluster A586

(d+1, 1)

Time-dependent cosmological term

spacetime. The equation of state describing this system is given in terms of the energy density,

WMAP Constraints on the Generalized Chaplygin Gas Model

\rho

Generalized Chaplygin gas and cosmic microwave background radiation constraints

, and pressure,

Revival of the unified dark energy-dark matter model?

p

Noncommutative gravitational quantum well

, by the relationship

Latest supernova data in the framework of the generalized Chaplygin gas model

p = - A/\rho^{\alpha}