Early Universe models from Noncommutative Geometry (2009)
Marcolli, Matilde, Pierpaoli, Elena
We investigate cosmological predictions on the early universe based on the noncommutative geometry models of gravity coupled to matter. Using the renormalization group analysis for the Standard Model...
Bock, James, Aljabri, Abdullah, Amblard, Alex, Baumann, Daniel, Betoule, Marc, Chui, Talso, ...
Measurements of Cosmic Microwave Background (CMB) anisotropy have served as the best experimental probe of the early universe to date. The inflationary paradigm, inspired in part by the extreme...
Observing the Evolution of the Universe (2009)
Aguirre, James, Amblard, Alexandre, Ashoorioon, Amjad, Baccigalupi, Carlo, Balbi, Amedeo, Bartlett, James, ...
How did the universe evolve? The fine angular scale (l>1000) temperature and polarization anisotropies in the CMB are a Rosetta stone for understanding the evolution of the universe. Through detailed...
CMBPol Mission Concept Study: Probing Inflation with CMB Polarization (2008)
Baumann, Daniel, Jackson, Mark G, Adshead, Peter, Amblard, Alexandre, Ashoorioon, Amjad, Bartolo, Nicola, ...
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 measurements to...
CMBPol Mission Concept Study: Reionization Science with the Cosmic Microwave Background (2008)
Zaldarriaga, Matias, Colombo, Loris, Komatsu, Eiichiro, Lidz, Adam, Mortonson, Michael, Oh, S. Peng, ...
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 can play....
CMBPol Mission Concept Study: Probing Inflation with CMB Polarization (2008)
Baumann, Daniel, Jackson, Mark G., Adshead, Peter, Amblard, Alexandre, Ashoorioon, Amjad, Bartolo, Nicola, ...
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 measurements to...
Point source contamination in CMB non-Gaussianity analyses (2008)
Babich, Daniel, Pierpaoli, Elena
In this paper we analyze the biasing effect of point sources, either thermal Sunyaev-Zeldovich clusters or standard radio sources, on the estimated strength of the non-Gaussianity in the cosmic...
Constraining massive neutrinos using cosmological 21 cm observations (2008)
Pritchard, Jonathan R., Pierpaoli, Elena
Observations of neutrino oscillations show that neutrinos have mass. However, the best constraints on this mass currently come from cosmology, via measurements of the cosmic microwave background and...
Model independent approaches to reionization in the analysis of upcoming CMB data (2008)
Colombo, Loris P. L., Pierpaoli, Elena
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 accurate and model...
Point Source Contamination in CMB Non-Gaussianity Analyses (2008)
Babich, Daniel, Pierpaoli, Elena
In this paper we analyze the biasing effect of point sources, either thermal Sunyaev-Zeldovich clusters or standard radio sources, on the estimated strength of the non-Gaussianity in the Cosmic...
Impact of dark matter decays and annihilations on reionization (2007)
Mapelli, Michela, Ferrara, Andrea, Pierpaoli, Elena
One of the possible methods to distinguish among various dark matter candidates is to study the effects of dark matter decays. We consider four different dark matter candidates (light dark matter,...
Bayesian foreground analysis with CMB data (2007)
Eriksen, Hans Kristian, Dickinson, C., Lawrence, C.R., Baccigalupi, Carlo, Banday, A.J., Gorski, K.M., ...
The quality of CMB observations has improved dramatically in the last few years, and will continue to do so in the coming decade. Over a wide range of angular scales, the uncertainty due to...
Dong, Feng, Pierpaoli, Elena, Gunn, James E., Wechsler, Risa H.
We present a modified adaptive matched filter algorithm designed to identify clusters of galaxies in wide-field imaging surveys such as the Sloan Digital Sky Survey. The cluster-finding technique is...
Effects of dark matter decay and annihilation on the high-redshift 21 cm background (2006)
Furlanetto, Steven R., Oh, S. Peng, Pierpaoli, Elena
The radiation background produced by the 21 cm spin-flip transition of neutral hydrogen at high redshifts can be a pristine probe of fundamental physics and cosmology. At z~30–300, the...
The Effects of Dark Matter Decay and Annihilation on the High-Redshift 21 cm Background (2006)
Furlanetto, Steven, Oh, S. Peng, Pierpaoli, Elena
The radiation background produced by the 21 cm spin-flip transition of neutral hydrogen at high redshifts can be a pristine probe of fundamental physics and cosmology. At z~30-300, the intergalactic...
New Cosmic Microwave Background Constraint to Primordial Gravitational Waves (2006)
Smith, Tristan L., Pierpaoli, Elena, Kamionkowski, Marc
Primordial gravitational waves (GWs) with frequencies >~10^-15 Hz contribute to the radiation density of the Universe at the time of decoupling of the cosmic microwave background (CMB). This affects...
Constraining Isocurvature Initial Conditions with WMAP 3-year data (2006)
Bean, Rachel, Dunkley, Joanna, Pierpaoli, Elena
We present constraints on the presence of isocurvature modes from the temperature and polarization CMB spectrum data from the WMAP satellite alone, and in combination with other datasets including...
Cosmological signatures of interacting neutrinos (2006)
Bell, Nicole F., Pierpaoli, Elena, Sigurdson, Kris
We investigate signatures of neutrino scattering in the cosmic microwave background (CMB) and matter power spectra, and the extent to which present cosmological data can distinguish between a...
A new cosmic microwave background constraint to primordial gravitational waves (2006)
Smith, Tristan L., Pierpaoli, Elena, Kamionkowski, Marc
Primordial gravitational waves (GWs) with frequencies > 10^{-15} Hz contribute to the radiation density of the Universe at the time of decoupling of the cosmic microwave background (CMB). The effects...
Cosmological Signatures of Interacting Neutrinos (2005)
Bell, Nicole F., Pierpaoli, Elena, Sigurdson, Kris
We investigate signatures of neutrino scattering in the Cosmic Microwave Background (CMB) and matter power spectra, and the extent to which present cosmological data can distinguish between a free...
Probing the Largest Scale Structure in the Universe with Polarization Map of Galaxy Clusters (2005)
We introduce a new formalism to describe the polarization signal of galaxy clusters on the whole sky. We show that a sparsely sampled, half-sky map of the cluster polarization at z~1 would allow us...
Massive galaxy clusters and the origin of Ultra High Energy Cosmic Rays (2005)
Pierpaoli, Elena, Farrar, Glennys
We investigate whether ultra--high energy cosmic rays (UHECR) may be preferentially produced in massive galaxy clusters, by looking for correlations between UHECR directions and those of x-ray...
Finding SZ clusters in the ACBAR maps (2005)
Pierpaoli, Elena, Anthoine, Sandrine
We present a new method for component separation from multifrequency maps aimed to extract Sunyaev-Zeldovich (SZ) galaxy clusters from Cosmic Microwave Background (CMB) experiments. This method is...
Probing the largest scale structure in the universe with polarization map of galaxy clusters (2005)
We introduce a new formalism to describe the polarization signal of galaxy clusters on the whole sky. We show that a sparsely sampled, half-sky map of the cluster polarization signal at $z\sim 1$...
Accretion flows in early-type galaxies and CMB experiments (2004)
Pierpaoli, Elena, Perna, Rosalba
We investigate the possible contribution from the emission of accretion flows around supermassive black holes in early type galaxies to current measurements of the Cosmic Microwave Background (CMB)...
Decaying particles and the reionization history of the Universe (2003)
We investigate the possibility that the Universe is reionized by the decay products of heavy particles. In particular we study under which circumstances this decay may produce a significant...
Measurement of the Sunyaev-Zel'dovich Increment in Massive Galaxy Clusters (2003)
Zemcov, Michael, Halpern, Mark, Borys, Colin, Chapman, Scott, Holland, Wayne, Pierpaoli, Elena, ...
We have detected the Sunyaev-Zel'dovich (SZ) increment at 850 microns in two galaxy clusters (Cl 0016+16 and MS 1054.4-0321) using SCUBA (Sub-millimetre Common User Bolometer Array) on the James...
Constraints on the cosmic neutrino background (2003)
The radiative component of the Universe has a characteristic impact on both large scale structure (LSS) and the cosmic microwave background radiation (CMB). We use the recent WMAP data, together with...
Point sources in the MAP sky maps (2003)
We discuss point sources foregrounds for the MAP experiment. We consider several possible strategies for removing them and we assess how the statistics of the CMB signal are affected by the residual...
Cosmological Difficulties with Modified Newtonian Dynamics (or: La Fin du MOND?) (2001)
Scott, Douglas, White, Martin, Cohn, Joanne D., Pierpaoli, Elena
The cold dark matter paradigm has been extremely successful for explaining a wide range of cosmological phenomena. Nevertheless, since evidence for non-baryonic dark matter remains indirect, all...
Boomerang returns unexpectedly (2000)
White, Martin, Scott, Douglas, Pierpaoli, Elena
Experimental study of the anisotropy in the cosmic microwave background (CMB) is gathering momentum. The eagerly awaited Boomerang results have lived up to expectations. They provide convincing...
Still flat after all these years (2000)
Pierpaoli, Elena, Scott, Douglas, White, Martin
The Universe could be spatially flat, positively curved or negatively curved. Each option has been popular at various times, partly affected by an understanding that models tend to evolve away from...
A Characteristic Scale on the Cosmic Microwave Sky (2000)
Pierpaoli, Elena, Scott, Douglas, White, Martin
The current suite of results from Cosmic Microwave Background anisotropy experiments is fulfilling the promise of providing extraordinary levels of discrimination between cosmological models. We...
Pierpaoli, Elena, Garcia-Bellido, Juan, Borgani, Stefano
In this paper we study the isocurvature mode contribution to the cosmic microwave background anisotropies and the large scale structure power spectrum, for a two-field model of inflation proposed by...
CMB and large-scale structure as a test of mixed models with n > 1 (1999)
Pierpaoli, Elena, Bonometto, Silvio A.
We compute CBR anisotropies in mixed models with different hot components, including neutrinos or volatile HDM arising from the decay of heavier particles. The CBR power spectra of these models...
The Formation of Cosmic Structures in a Light Gravitino Dominated Universe (1997)
Pierpaoli, Elena, Borgani, Stefano, Masiero, Antonio, Yamaguchi, Masahiro
We analyse the formation of cosmic structures in models where the dark matter is dominated by light gravitinos with mass of $ 100$ eV -- 1 keV, as predicted by gauge-mediated supersymmetry (SUSY)...
Large-Scale Structure in Mixed Dark Matter Models with a Non-thermal Volatile Component (1996)
Pierpaoli, Elena, Coles, Peter, Bonometto, Silvio, Borgani, Stefano
We investigate the properties of large--scale structure predicted in a class of mixed dark matter models in which the volatile component (made of particles with high rms velocity) derives from the...