192 citations · 4k across the 104 of their papers we have counts for
11 papers · 1 filter
Spherical collapse model with shear and angular momentum in dark energy cosmologies
A. Del Popolo, F. Pace, J. A. S. Lima
We study, for the first time, how shear and angular momentum modify typical parameters of the spherical collapse model, in dark energy dominated universes. In particular, we study…
Expansion History with Decaying Vacuum: A Complete Cosmological Scenario
J. A. S. Lima, S. Basilakos, Joan Sola
We propose a novel cosmological scenario with the space-time emerging from a pure initial de Sitter stage and subsequently evolving into the radiation, matter and dark energy domin…
Extended Spherical Collapse and the Accelerating Universe
Antonino Del Popolo, Francesco Pace, J. A. S. Lima
The influence of the shear stress and angular momentum on the nonlinear spherical collapse model is discussed in the framework of the Einstein-de Sitter (EdS) and CDM models. By…
Black Hole Formation with an Interacting Vacuum Energy Density
M. Campos, J. A. S. Lima
We discuss the gravitational collapse of a spherically symmetric massive core of a star in which the fluid component is interacting with a growing vacuum energy density. The influe…
A 3% Determination of at Intermediate Redshifts
J. A. S. Lima, J. V. Cunha
Recent determinations of the Hubble constant, H_0, at extremely low and very high redshifts based on the cosmic distance ladder (grounded with trigonometric parallaxes) and a cosmo…
Is the transition redshift a new cosmological number?
J. A. S. Lima, J. F. Jesus, R. C. Santos +1
Observations from Supernovae Type Ia (SNe Ia) provided strong evidence for an expanding accelerating Universe at intermediate redshifts. This means that the Universe underwent a tr…