Davide Pietrobon

Needlet Detection of Features in WMAP CMB Sky and the Impact on Anisotropies and Hemispherical Asymmetries (2008)

Pietrobon, Davide, Amblard, Alexandre, Balbi, Amedeo, Cabella, Paolo, Cooray, Asantha, Marinucci, Domenico

We apply spherical needlets to the Wilkinson Microwave Anisotropy Probe 5-year cosmic microwave background (CMB) dataset, to search for imprints of non-isotropic features in the CMB sky. We use the...

Affine parameterization of the dark sector: costraints from WMAP5 and SDSS (2008)

Pietrobon, Davide, Balbi, Amedeo, Bruni, Marco, Quercellini, Claudia

We study a set of universe models where the dark sector is described by a perfect fluid with an affine equation of state $P=P_0+\alpha \rho$, focusing specifically on cosmological perturbations in a...

Late universe dynamics with scale-independent linear couplings in the dark sector (2008)

Quercellini, Claudia, Bruni, Marco, Balbi, Amedeo, Pietrobon, Davide

We explore the dynamics of cosmological models with two coupled dark components with energy densities $\rho_A$ and $\rho_B$. We assume that the coupling is of the form $Q=Hq(\rho_A,\rho_B)$, so that...

Dark Energy Constraints from Needlets Analysis of Wmap3 and NVSS Data (2006)

Pietrobon, Davide, Balbi, Amedeo, Marinucci, Domenico

We cross-correlate the new 3 year Wilkinson Microwave Anistropy Probe (WMAP3) cosmic microwave background (CMB) data with the NRAO VLA Sky Survey (NVSS) radio galaxy data, and find further evidence...

Integrated Sachs-Wolfe effect from the cross correlation of WMAP3 year and the NRAO VLA sky survey data: New results and constraints on dark energy (2006)

Pietrobon, Davide, Balbi, Amedeo, Marinucci, Domenico

We cross-correlate the new 3 year Wilkinson Microwave Anistropy Probe (WMAP) cosmic microwave background (CMB) data with the NRAO VLA Sky Survey (NVSS) radio galaxy data, and find further evidence of...