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

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

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007apj...670l..73d&link_type=abstract

The Astrophysical Journal, Volume 670, Issue 2, pp. L73-L76.

Astronomy and Astrophysics

Astronomy

14

Cosmology: Cosmic Microwave Background

Scientific paper

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

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