Extended Theories of Gravity can be considered as a new paradigm to cure shortcomings of
General Relativity at infrared and ultraviolet scales. They are an approach that, by …

Physics welcomes the idea that space contains energy whose gravitational effect
approximates that of Einstein's cosmological constant, Λ; today the concept is termed dark …

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▪ Abstract The Sunyaev-Zel'dovich effect (SZE) provides a unique way to map the large-
scale structure of the universe as traced by massive clusters of galaxies. As a spectral …

Astrophysical observations are pointing out huge amounts of “dark matter” and “dark energy”
needed to explain the observed large scale structure and cosmic dynamics. The emerging …

We have measured the equivalent width of the Hα emission line for 11 006 galaxies brighter
than M b=− 19 (ΩΛ= 0.7, Ω m= 0.3, H 0= 70 km s− 1 Mpc− 1) at 0.05< z< 0.1 in the 2dF …

Quintessence issues can be achieved by taking into account higher order curvature
invariants into the effective action of gravitational field. Such an approach is naturally related …

Higher-order theories of gravity have recently attracted a lot of interest as alternative
candidates to explain the observed cosmic acceleration without the need of introducing any …

We investigate the effects of viscosity terms depending on the Hubble parameter and its
derivatives in the dark energy equation of state. Such terms are possible if dark energy is a …

General Relativity is today the best theory of gravity addressing a wide range of phenomena.
Our understanding of physical laws, from cosmology to local scales, cannot be properly …