54 citations · 467 across the 45 of their papers we have counts for
4 papers · 2 filters
Strong limits on the possible decay of the vacuum energy into CDM or CMB photons
Reuven Opher, Ana Pelinson
We investigate models that suggest that the vacuum energy decays into cold dark matter (CDM) and into a homogeneous distribution of a thermalized cosmic microwave background (CMB),…
Inflation without inflatons
Reuven Opher, Ana Pelinson
(abridged)We present a model which predicts inflation without the presence of inflaton fields, based on the εR^2 and Starobinsky models. It links the above models to the observable…
Constraints on dark energy from the observed density fluctuations spectrum and supernova data
Reuven Opher, Ana Pelinson
One of the greatest challenges in cosmology today is to determine the nature of dark energy, the source of the observed present acceleration of the universe. High precision experim…
A new inflaton model beginning near the Planck epoch
Reuven Opher, Ana Pelinson
The Starobinsky model predicts a primordial inflation period without the presence of an inflaton field. The modified version of this model predicts a simple time dependence for the…