6.6k citations · 30.5k across the 130 of their papers we have counts for
11 papers · 1 filter
Cosmological parameters after WMAP5: forecasts for Planck and future galaxy surveys
L. P. L. Colombo, E. Pierpaoli, J. R. Pritchard
The Planck satellite is expected to improve the measurement of most cosmological parameters by several factors with respect to current WMAP results. The actual performance may depe…
CMBPol Mission Concept Study: Reionization Science with the Cosmic Microwave Background
Matias Zaldarriaga, Loris Colombo, Eiichiro Komatsu +6
We summarize existing constraints on the epoch of reionization and discuss the observational probes that are sensitive to the process. We focus on the role large scale polarization…
CMBPol Mission Concept Study: Probing Inflation with CMB Polarization
Daniel Baumann, Mark G. Jackson, Peter Adshead +56
We summarize the utility of precise cosmic microwave background (CMB) polarization measurements as probes of the physics of inflation. We focus on the prospects for using CMB measu…
Higher neutrino mass allowed if Cold Dark Matter and Dark Energy are coupled
G. La Vacca, S. A. Bonometto, L. P. L. Colombo
Cosmological limits on neutrino masses are softened, by more than a factor 2, if Cold Dark Matter (CDM) and Dark Energy (DE) are coupled. In turn, a neutrino mass yielding up…
Model independent approaches to reionization in the analysis of upcoming CMB data
Loris P. L. Colombo, Elena Pierpaoli
On large angular scales, CMB polarization depends mostly on the evolution of the ionization level of the IGM during reionization. In order to avoid biasing parameter estimates, an…
Dark Matter - Dark Energy coupling biasing parameter estimates from CMB data
Giuseppe La Vacca, Loris P. L. Colombo, Luca Vergani +1
When CMB data are used to derive cosmological parameters, their very choice does matter: some parameter values can be biased if the parameter space does not cover the "true" model.…
The Dark Side and its Nature
S. A. Bonometto, R. Mainini, L. P. L. Colombo
Although the cosmic concordance cosmology is quite successful in fitting data, fine tuning and coincidence problems apparently weaken it. We review several possibilities to ease it…
Dark Matter and Dark Energy from a single scalar field and CMB data
Roberto Mainini, Loris P. L. Colombo, Silvio A. Bonometto
Axions are likely to be the Dark Matter (DM) that cosmological data require. They arise in the Peccei Quinn solution of the strong CP problem. In a previous work we showed that the…
Cosmic Microwave Background Polarization and reionization: constraining models with a double reionization
L. P. L. Colombo, G. Bernardi, L. Casarini +4
Neutral hydrogen around high-z QSO and an optical depth tau ~ 0.17 can be reconciled if reionization is more complex than a single transition at z ~ 6-8. Tracing its details could…
Constraining the reionization history with large angle CMB polarization
Loris PL Colombo
The first-year WMAP data release showed that the reionization optical depth to CMB photons is greater than previously thought. This follows from unexpectedly high values of the C^T…
Polarization Measures And Nature Of Dark Energy
L. P. L. Colombo, R. Mainini, S. A. Bonometto
Polarization measures, on wide angular scales, together with anisotropy data, can fix DE parameters. Here we discuss the sensitivity needed to provide significant limits. Our analy…