192 citations · 4k across the 104 of their papers we have counts for
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Deflationary cosmology: observational expressions
J. V. Cunha, J. A. S. Lima, N. Pires
We discuss the classical cosmological tests for a large class of FRW type models driven by a decaying vacuum energy density. Analytic expressions for the lookback time, age of the…
Deflationary cosmology: constraints from angular size and ages of globular clusters
J. V. Cunha, J. S. Alcaniz, J. A. S. Lima
Observational constraints to a large class of decaying vacuum cosmologies are derived using the angular size data of compact radio sources and the latest age estimates of globular…
Cosmological Constant, Conical Defect and Classical Tests of General Relativity
Wilson H. C. Freire, V. B. Bezerra, J. A. S. Lima
We investigate the perihelion shift of the planetary motion and the bending of starlight in the Schwarzschild field modified by the presence of a -term plus a conical defect. Th…
Thermodynamic Approach to Warm Inflation
J. A. S. Lima, J. A. Espichán Carrillo
We study the thermodynamic behavior of a decaying scalar field coupled to a relativistic simple fluid. It is shown that if the decay products are represented by a thermalized bath,…
Cosmological implications of old galaxies at high redshifts
J. A. S. Lima, J. S. Alcaniz
Old high- galaxies are important tools for understanding the structure formation problem and may become the key to determine the ultimate fate of the Universe. In this {\it lett…