932 citations · 3.2k across the 35 of their papers we have counts for
3 papers · 1 filter
Cosmology, Thermodynamics and Matter Creation
J. A. S. Lima, M. O. Calvao, I. Waga
Several approaches to the matter creation problem in the context of cosmological models are summarily reviewed. A covariant formulation of the general relativistic imperfect simple…
Bulk viscosity and deflationary universes
J. A. S. Lima, R. Portugal, I. Waga
We analyze the conditions that make possible the description of entropy generation in the new inflationary model by means of a nearequilibrium process. We show that there are situa…
When did cosmic acceleration start? How fast was the transition?
Emille E. O. Ishida, Ribamar R. R. Reis, Alan V. Toribio +1
Cosmic acceleration is investigated through a kink-like expression for the deceleration parameter (q). The new parametrization depends on the initial (q_i) and final (q_f) values o…