75 citations · 191 across the 4 of their papers we have counts for
4 papers
Affine parameterization of the dark sector: costraints from WMAP5 and SDSS
Davide Pietrobon, Amedeo Balbi, Marco Bruni +1
We study a set of universe models where the dark sector is described by a perfect fluid with an affine equation of state , focusing specifically on cosmological perturbat…
Peculiar acceleration
Luca Amendola, Claudia Quercellini, Amedeo Balbi
It has been proposed recently to observe the change in cosmological redshift of distant galaxies or quasars with the next generation of large telescope and ultra-stable spectrograp…
Affine equation of state from quintessence and k-essence fields
Claudia Quercellini, Marco Bruni, Amedeo Balbi
We explore the possibility that a scalar field with appropriate Lagrangian can mimic a perfect fluid with an affine barotropic equation of state. The latter can be thought of as a…
DM: Observational constraints on unified dark matter with constant speed of sound
Amedeo Balbi, Marco Bruni, Claudia Quercellini
We consider the hypothesis that dark energy and dark matter are the two faces of a single dark component, a unified dark matter (UDM) that we assume can be modeled by the affine eq…