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Published December 1, 2007 | Published
Journal Article Open

Searching for Non-Gaussian Signals in the BOOMERANG 2003 CMB Maps


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 f_(NL) as -300 < f_(NL) < 650 at 68% CL and -800 < f_(NL) < 1050 at 95% CL.

Additional Information

© 2007 American Astronomical Society. Print publication: Issue 2 (2007 December 1); received 2007 May 11; accepted for publication 2007 October 15; published 2007 October 29. BOOMERANG was supported by CIAR, CSA, and NERSC in Canada, ASI, University La Sapienza and PNRA in Italy, and NASA and NSF in the US. We thank CASPUR and NERSC/LBL. We acknowledge the use of HEALPix.

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August 19, 2023
October 19, 2023