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Generalized Chaplygin gas and CMBR constraints
M. C. Bento, O. Bertolami, A. A. Sen
We study the dependence of the location of the Cosmic Microwave Background Radiation (CMBR) peaks on the parameters of the generalized Chaplygin gas model, whose equation of state…
Generalized Chaplygin gas as a scheme for Unification of Dark Energy and Dark Matter
M. C. Bento, O. Bertolami, A. A. Sen
We study the cosmological scenario arising from the dynamics of a generalized Chaplygin gas. The equation of state of the system is given in terms of the energy density, , and p…
Tachyonic Inflation in the Braneworld Scenario
M. C. Bento, O. Bertolami, A. A. Sen
We consider cosmological inflation driven by the rolling tachyon in the context of the braneworld scenario. We show that sufficient inflation consistent with the observational cons…
Supergravity Inflation on the Brane
M. C. Bento, O. Bertolami, A. A. Sen
We study N=1 Supergravity inflation in the context of the braneworld scenario. Particular attention is paid to the problem of the onset of inflation at sub-Planckian field values a…
Generalized Chaplygin Gas, Accelerated Expansion and Dark Energy-Matter Unification
M. C. Bento, O. Bertolami, A. A. Sen
We consider the scenario emerging from the dynamics of a generalized -brane in a spacetime. The equation of state describing this system is given in terms of the ener…