GROWTH OF PRIMORDIAL FLUCTUATIONS IN A VACUUM ENERGY DECAY MODEL

In this work we analyze the evolution of baryonic and dark matter perturbations that give rise to the first gravitational bounded systems in our Universe, also named population III objects. This study is set up in a context of a vacuum energy decaying into dark matter model. We analyze the evolution of clouds of dark matter within the range of mass of 10(4-8)M(circle dot). The evolution of the perturbations are followed from the beginning of the recombination era, taking into account several physical mechanisms that act in the baryonic component during and after this period. From the knowledge of the more recent observational values of the cosmological parameters, we do a quantitative physical analysis of the redshift and age of each bounding gravitational system formed.