Searching for non-Gaussian signals in the BOOMERANG 2003 CMB maps

De Troia, G, Kunz, Martin and et al, (2007) Searching for non-Gaussian signals in the BOOMERANG 2003 CMB maps. Astrophysical Journal Letters, 670 (2). pp. 73-76. ISSN 2041-8205

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We analyze the BOOMERANG 2003 (B03) 145 GHz temperature map to constrain the amplitude of a non-Gaussian, primordial contribution to CMB fluctuations. We perform a pixel-space analysis restricted to a portion of the map chosen in view of high-sensitivity, very low foreground contamination and tight control of systematic effects. We set up an estimator based on the three Minkowski functionals which relies on high-quality simulated data, including non-Gaussian CMB maps. We find good agreement with the Gaussian hypothesis and derive the first limits based on BOOMERANG data for the nonlinear coupling parameter fNL as -300 < fNL < 650 at 68% CL and -800 < fNL < 1050 at 95% CL.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics
Depositing User: Martin Kunz
Date Deposited: 06 Feb 2012 20:49
Last Modified: 08 Mar 2017 05:59

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