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...
CMB polarization systematics due to beam asymmetry: Impact on inflationary science (2008)
Shimon, Meir, Keating, Brian, Ponthieu, Nicolas, Hivon, Eric
Cosmic microwave background (CMB) polarization provides a unique window into cosmological inflation; the amplitude of the B-mode polarization from last scattering is uniquely sensitive to the...
Alex Amblard, Beichman, Charles, Bock, James, Caldwell, Robert, Carlstrom, John, Church, Sarah, ...
When we began our study we sought to answer five fundamental implementation questions: 1) can foregrounds be measured and subtracted to a sufficiently low level?; 2) can systematic errors be...
Prepared Krzysztof, M. Górski, Benjamin D. W, Eric Hivon, Frode K. Hansen, Anthony J
Abstract: HEALPix is a Hierarchical, Equal Area, and iso-Latitude Pixelisation of the sphere designed to support efficiently (1) local operations on the pixel set, (2) a hierarchical tree structure...
CMB Polarization Systematics Due to Beam Asymmetry: Impact on Inflationary Science (2007)
Shimon, Meir, Keating, Brian, Ponthieu, Nicolas, Hivon, Eric
CMB polarization provides a unique window into cosmological inflation; the amplitude of the B-mode polarization from last scattering is uniquely sensitive to the energetics of inflation. However,...
Fast estimation of polarization power spectra using correlation functions (2003)
Chon, Gayoung, Challinor, Anthony, Prunet, Simon, Hivon, Eric, Szapudi, Istvan
We present a fast method for estimating the cosmic microwave background polarization power spectra using unbiased estimates of heuristically-weighted correlation functions. This extends the...
Opening A New Window to the Early Universe (2002)
Hivon, Eric, Kamionkowski, Marc
DASI has ended a 34-year quest to detect the CMB polarization, sounding the starting gun for a new race to peer further back in time, with more precision than ever before. Many more CMB polarization...
Gabor Transforms on the Sphere with Applications to CMB Power Spectrum Estimation (2002)
Hansen, Frode K., Gorski, Krzysztof M., Hivon, Eric
The Fourier transform of a dataset apodised with a window function is known as the Gabor transform. In this paper we extend the Gabor transform formalism to the sphere with the intention of applying...
Wandelt, Benjamin D., Hivon, Eric, Gorski, Krzysztof M.
As the era of high precision cosmology approaches, the empirically determined power spectrum of the microwave background anisotropy $C_l$ will provide a crucial test for cosmological theories. We...
Multiparameter estimation with the Pseudo-C_l method (2000)
Wandelt, Benjamin D., Gorski, Krzysztof M., Hivon, Eric
We apply the Pseudo-C_l formalism to obtain an unbiased, approximate method for efficient simultaneous estimation of several cosmological parameters from large, almost full-sky cosmic microwave...
Gorski, Krzysztof M., Wandelt, Benjamin D., Hansen, Frode K., Hivon, Eric, Banday, Anthony J.
HEALPix is a Hierarchical, Equal Area, and iso-Latitude Pixelisation of the sphere designed to support efficiently - local operations on the pixel set, - a hierarchical tree structure for...
CMB anisotropy power spectrum statistics (1998)
Wandelt, Benjamin D., Hivon, Eric, Gorski, Krzysztof M.
Much attention has been given to the problem of estimating cosmological parameters from the $C_l$ measured by future experiments. Many of the approaches which are being used either invoke poorly...
Cosmic microwave background anisotropy power spectrum statistics for high precision cosmology (1998)
Wandelt, Benjamin D., Hivon, Eric, Gorski, Krzysztof M.
As the era of high precision cosmology approaches, the empirically determined power spectrum of the microwave background anisotropy, $C_l$, will provide a crucial test for cosmological theories. We...
Topological Analysis of High-Resolution CMB Maps (1998)
Wandelt, Benjamin D., Hivon, Eric, Gorski, Kris M.
We report the development of numerical tools for the topological analysis of sub--degree resolution, all--sky maps. Software to be released in the HEALFAST (V0.9) package defines neighbour...
Non-Linear Evolution of the Bispectrum of Cosmological Perturbations (1997)
Scoccimarro, Roman, Colombi, Stephane, Fry, J. N., Frieman, Joshua A., Hivon, Eric, Melott, Adrian
The bispectrum, the three-point function of density fluctuations in Fourier space, is the lowest order statistic that carries information about the spatial coherence of large-scale structures. For...
Previrialization: Perturbative and N-Body Results (1995)
Lokas, Ewa L., Juszkiewicz, Roman, Bouchet, Francois R., Hivon, Eric
We present a series of N-body experiments which confirm the reality of the previrialization effect. We also use weakly nonlinear perturbative approach to study the phenomenon. These two approaches...