2009/09/30 by Joseph Smidt, Shahab Joudaki, Paolo Serra +3 · 8 citations
Mathematics · Physics and Astronomy · #Anisotropy #Astrophysics #Cosmic background radiation #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Covariance #Galaxies: Formation, Evolution, Phenomena #Galaxy #Gravitational lens #Gravitational lensing formalism #Non-Gaussianity #Physics #Planck #Quantum mechanics #Redshift #Spectral density #Statistical and numerical algorithms #Statistics #Trispectrum #Weak gravitational lensing #astro-ph.CO
paper · pdf · doi:10.1103/physrevd.81.123528
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 81(12) (American Physical Society) · 9 pages. Fixed some typos
openalex publication_date 2010/06/24 · arxiv created 2010/07/13 · arxiv updated 2010/12/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We consider corrections to the underlying cosmology due to secondary contributions from weak gravitational lensing, the integrated Sachs-Wolfe effect, and the Sunyaev-Zel'dovich effect contained in the trispectrum. We incorporate these additional contributions to the covariance of a binned angular power spectrum of temperature anisotropies in the analysis of current and prospective data sets. Although recent experiments such as the Arcminute Cosmology Bolometer Array Receiver and the Cosmic Background Imager are not particularly sensitive to these additional non-Gaussian effects, the interpretation of Planck and CMBPol anisotropy spectra will require an accounting of non-Gaussian covariance leading to a degradation in cosmological parameter estimates by up to 20% and 30%, respectively.