134 citations · 770 across the 19 of their papers we have counts for
3 papers · 1 filter
CMB constraints on spatial variations of the vacuum energy density
P. P. Avelino, A. Canavezes, J. P. M. de Carvalho +1
In a recent article, a simple `spherical bubble' toy model for a spatially varying vacuum energy density was introduced, and type Ia supernovae data was used to constrain it. Here…
Supernova constraints on spatial variations of the vacuum energy density
P. P. Avelino, J. P. M. de Carvalho, C. J. A. P. Martins
We consider a very simple toy model for a spatially varying `cosmological constant', where we are inside a spherical bubble (with a given set of cosmological parameters) that is su…
Early-universe constraints on a time-varying fine structure constant
P. P. Avelino, S. Esposito, G. Mangano +6
Higher-dimensional theories have the remarkable feature of predicting a time (and hence redshift) dependence of the `fundamental' four dimensional constants on cosmological timesca…