1.3k citations · 7.4k across the 101 of their papers we have counts for
45 papers · 1 filter
Constraints on Primordial Non-Gaussianity from a Needlet Analysis of the WMAP-5 Data
Davide Pietrobon, Paolo Cabella, Amedeo Balbi +2
We look for a non-Gaussian signal in the WMAP 5-year temperature anisotropy maps by performing a needlet-based data analysis. We use the foreground-reduced maps obtained by the WMA…
Needlet Detection of Features in WMAP CMB Sky and the Impact on Anisotropies and Hemispherical Asymmetries
Davide Pietrobon, Alexandre Amblard, Amedeo Balbi +3
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 CM…
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…
Mapping the galactic gravitational potential with peculiar acceleration
Claudia Quercellini, Luca Amendola, Amedeo Balbi
It has been suggested recently that the change in cosmological redshift (the Sandage test of expansion) could be observed in the next generation of large telescopes and ultra-stabl…
Late universe dynamics with scale-independent linear couplings in the dark sector
Claudia Quercellini, Marco Bruni, Amedeo Balbi +1
We explore the dynamics of cosmological models with two coupled dark components with energy densities and . We assume that the coupling is of the form , s…
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…
Spherical Needlets for CMB Data Analysis
D. Marinucci, D. Pietrobon, A. Balbi +6
We discuss Spherical Needlets and their properties. Needlets are a form of spherical wavelets which do not rely on any kind of tangent plane approximation and enjoy good localizati…
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…
The time evolution of cosmological redshift as a test of dark energy
A. Balbi, C. Quercellini
The variation of the expansion rate of the Universe with time produces an evolution in the cosmological redshift of distant sources (for example quasar Lyman- absorption lines),…
Making Maps from Planck LFI 30GHz Data
M. A. J. Ashdown, C. Baccigalupi, A. Balbi +16
This paper is one of a series describing the performance and accuracy of map-making codes as assessed by the Planck CTP working group. We compare the performance of multiple codes…
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…
Cosmology from Planck
Amedeo Balbi
I briefly review some of the main scientific outputs expected from the upcoming Planck mission. Planck will map the CMB sky with 5' resolution and K sensitivity, with minimal fo…
Dark Energy Constraints from Needlets Analysis of Wmap3 and NVSS Data
Davide Pietrobon, Amedeo Balbi, Domenico Marinucci
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…
The CMB polarization: status and prospects
Amedeo Balbi, Paolo Natoli, Nicola Vittorio
The study of cosmic microwave background (CMB) polarization is still in a pioneering stage, but promises to bring a huge advancement in cosmology in the near future, just as high-a…
Making sky maps from Planck data
M. A. J. Ashdown, C. Baccigalupi, A. Balbi +15
We compare the performance of multiple codes written by different groups for making polarized maps from Planck-sized, all-sky cosmic microwave background (CMB) data. Three of the c…
Constraints on cosmological parameters
A. Balbi
A cosmological model with total density close to critical (and flat geometry), dominated by dark matter and dark energy of unknown nature, and consistent with the basic predictions…
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
Davide Pietrobon, Amedeo Balbi, Domenico Marinucci
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…
ROMA: a map-making algorithm for polarised CMB data sets
Giancarlo de Gasperis, Amedeo Balbi, Paolo Cabella +2
We present ROMA, a parallel code to produce joint optimal temperature and polarisation maps out of multidetector CMB observations. ROMA is a fast, accurate and robust implementatio…
Comparison of map-making algorithms for CMB experiments
T. Poutanen, G. de Gasperis, E. Hivon +12
We have compared the cosmic microwave background (CMB) temperature anisotropy maps made from one-year time ordered data (TOD) streams that simulated observations of the originally…
Cosmological parameters and the WMAP data revisited
F. K. Hansen, A. Balbi, A. J. Banday +1
Several recent papers have made claims about the detection of an asymmetric distribution of large scale power in the cosmic microwave background anisotropy as measured by the WMAP…
Imaging the first light: experimental challenges and future perspectives in the observation of the Cosmic Microwave Background Anisotropy
A. Mennella, C. Baccigalupi, A. Balbi +17
Measurements of the cosmic microwave background (CMB) allow high precision observation of the Last Scattering Surface at redshift 1100. After the success of the NASA satelli…
Unbiased Estimation of an Angular Power Spectrum
G. Polenta, D. Marinucci, A. Balbi +5
We discuss the derivation of the analytic properties of the cross-power spectrum estimator from multi-detector CMB anisotropy maps. The method is computationally convenient and it…
MAXIMA: A Balloon-Borne Cosmic Microwave Background Anisotropy Experiment
B. Rabii, C. D. Winant, M. E. Abroe +20
We describe the Millimeter wave Anisotropy eXperiment IMaging Array (MAXIMA), a balloon-borne experiment designed to measure the temperature anisotropy of the Cosmic Microwave Back…
Measuring CMB Polarization with BOOMERANG
T. Montroy, P. A. R. Ade, A. Balbi +38
BOOMERANG is a balloon-borne telescope designed for long duration (LDB) flights around Antarctica. The second LDB Flight of BOOMERANG took place in January 2003. The primary goal o…