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Early acceleration and adiabatic matter perturbations in a class of dilatonic dark-energy models
L. Amendola, M. Gasperini, D. Tocchini-Valentini +1
We estimate the growth of matter perturbations in a class of recently proposed dark-energy models based on the (loop-corrected) gravi-dilaton string effective action, and character…
Perturbations growth and bias during acceleration
Luca Amendola, Domenico Tocchini-Valentini
In most models of dark energy the structure formation stops when the accelerated expansion begins. In contrast, we show that the coupling of dark energy to dark matter may induce t…
Constraints on the interaction and self-interaction of dark energy from cosmic microwave background
Luca Amendola, Claudia Quercellini, Domenico Tocchini-Valentini +1
It is well-known that even high quality cosmic microwave background (CMB) observations are not sufficient on their own to determine the equation of state of the dark energy, due to…