54 citations · 467 across the 45 of their papers we have counts for
34 papers · 1 filter
Origin of Intense Magnetic Fields Near Black Holes Due to Non-Minimal Gravitational-Electromagnetic Coupling
Rafael S. de Souza, Reuven Opher
The origin of magnetic fields in astrophysical objects is a challenging problem in astrophysics. Throughout the years, many scientists have suggested that non-minimal gravitational…
A New Test for Dark Energy Models
R. Opher, A. Pelinson
(Abridged) Tests that have been proposed to differentiate among dark energy (DE) models are based on observations of galaxies at high redshift (z>0), to be obtained in the future.…
The Origin of Primordial Magnetic Fields
Rafael S. de Souza, Reuven Opher
(abridged) We suggest here that the large scale fields G, observed in galaxies at both high and low redshifts by Faraday Rotation Measurements (FRMs), have their origin in…
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…