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

De Troia, G., Ade, Peter A. R., Bock, J. J., Bond, J. R., Borrill, J., Boscaleri, A., Cabella, P., Contaldi, C. R., Crill, B. P., de Bernardis, P., De Gasperis, G., de Oliveira-Costa, A., Di Stefano, G., Ferreira, P. G., Hivon, E., Jaffe, A. H., Kisner, T. S., Kunz, M., Jones, W. C., Lange, A. E., Liguori, M., Masi, S., Matarrese, S., Mauskopf, Philip Daniel, MacTavish, C. J., Melchiorri, A., Montroy, T. E., Natoli, P., Netterfield, C. B., Pascale, E., Piacentini, F., Pogosyan, D., Polenta, G., Prunet, S., Ricciardi, S., Romeo, G., Ruhl, J. E., Santini, P., Tegmark, M., Veneziani, M. and Vittorio, N. 2007. Searching for non-Gaussian signals in the BOOMERANG 2003 CMB maps. Astrophysical Journal Letters 670 (2) , L73. 10.1086/524402

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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
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: IOP Science
ISSN: 0004-637X
Last Modified: 23 Jan 2020 04:00

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