Probing Non-Gaussianity In The Cosmic Microwave Background Anisotropies: One Point Distribution Function

Abstract

We analyze WMAP 3 year data using the one-point distribution functions to probe the non-Gaussianity in the Cosmic Microwave Background (CMB) Anisotropy data. Computer simulations are performed to determine the uncertainties of the results. We report the non-Gaussianity parameter f_NL is constrained to 26<f_NL<82 for Q-band, 12<f_NL<67 for V-band, 7<f_NL<64 for W-band and 23<f_NL<75 for Q+V+W combined data at 95% confidence level (CL).

4 pages, 2 figures in postscripts, some typos corrected

Cited by in corpus (8)

• On the Issue of the ζSeries Convergence and Loop Corrections in the Generation of Observable Primordial Non-Gaussianity in Slow-Roll Inflation. Part I: the Bispectrum
• Large Nongaussianity from Nonlocal Inflation
• A high-significance detection of non-Gaussianity in the WMAP 5-year data using directional spherical wavelets
• Tachyon-Dilaton-induced Inflation as an alpha'-resummed String Background
• Non-gaussianity and Statistical Anisotropy in Cosmological Inflationary Models
• On the four-dimensional effective theories in brane-worlds
• Non-Gaussian Distribution and Clustering of Hot and Cold Pixels in the WMAP Five-Year Sky
• Non-standard morphological relic patterns in the cosmic microwave background