Imprint of distortions in the Oort Cloud on the CMB anisotropies (2009)
We study the effect of a close encounter of a passing star on the shape of the inner Oort Cloud, using the impulse approximation. The deviation of the perturbed Oort Cloud from sphericity adds...
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...
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...
What Can the Cosmic Microwave Background Tell Us about the Outer Solar System? (2007)
Babich, Daniel, Blake, Cullen H., Steinhardt, Charles L.
We discuss two new observational techniques that use observations of the cosmic microwave background (CMB) to place constraints on the mass, distance, and size distribution of small objects in the...
What Can the Cosmic Microwave Background Tell Us About the Outer Solar System? (2007)
Babich, Daniel, Blake, Cullen H., Steinhardt, Charles
We discuss two new observational techniques that use observations of the Cosmic Microwave Background (CMB) to place constraints upon the mass, distance, and size distribution of small objects in the...
Imprint of Distortions in the Oort Cloud on the CMB Anisotropies (2007)
We study the effect of a close encounter of a passing star on the shape of the inner Oort Cloud, using the impulse approximation. The deviation of the perturbed Oort Cloud from sphericity adds...
Cosmic microwave background anisotropies from outflows in Lyman break galaxies (2007)
Babich, Daniel, Loeb , Abraham
Thomson scattering of the cosmic microwave background (CMB) on moving electrons in the outflows of Lyman break galaxies (LBGs) at redshifts 2–8 contributes to the small-scale CMB anisotropies. The...
CMB Anisotropies from Outflows in Lyman Break Galaxies (2006)
Thomson scattering of the Cosmic Microwave Background (CMB) on moving electrons in the outflows of Lyman Break Galaxies (LBGs) at redshifts 2-8 contributes to the small-scale CMB anisotropies. The...
We consider the effects of inhomogeneous reionization on the distribution of galaxies at high redshifts. Modulation of the formation process of the ionizing sources by large scale density modes makes...
Polarization of 21cm Radiation from the Epoch of Reionization (2005)
We consider the polarization of 21cm line radiation from the epoch of reionization due to both intrinsically polarized emission and secondary mechanisms. We argue that Thomson scattering of the 21cm...
Optimal Estimation of Non-Gaussianity (2005)
We systematically analyze the primordial non-Gaussianity estimator used by the Wilkinson Microwave Anisotropy Probe (WMAP) science team with the basic ideas of estimation theory in order to see if...
Primordial Bispectrum Information from CMB Polarization (2004)
Babich, Daniel, Zaldarriaga, Matias
After the precise observations of the Cosmic Microwave Background (CMB) anisotropy power spectrum, attention is now being focused on the higher order statistics of the CMB anisotropies. Since linear...
The shape of non-Gaussianities (2004)
Babich, Daniel, Creminelli, Paolo, Zaldarriaga, Matias
We study the dependence on configuration in momentum space of the primordial 3-point function of density perturbations in several different scenarios: standard slow-roll inflation, curvaton and...