35 citations · 35 across the 1 of their papers we have counts for
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astro-ph2007★ 35 cited
Coupled quintessence and vacuum decay
F. E. M. Costa, J. S. Alcaniz, J. M. F. Maia
We discuss observational consequences of a class of cosmological models characterized by the dilution of pressureless matter attenuated with respect to the usual scaling d…
astro-ph2004
Instant preheating mechanism and UHECR
A. H. Campos, J. M. F. Maia, R. Rosenfeld
Top-down models assume that the still unexplained Ultra High Energy Cosmic Rays (UHECR's) are the decay products of superheavy particles. Such particles may have been produced by o…
astro-ph2002
Current and future supernova constraints on decaying cosmologies
J. S. Alcaniz, J. M. F. Maia
We investigate observational constraints from present and future supernova data on a large class of decaying vacuum cosmologies. In such scenarios the present value of the vacuum e…