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

De Troia, G., Ade, Peter A. R. ORCID: https://orcid.org/0000-0002-5127-0401, 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 ORCID: https://orcid.org/0000-0001-6397-5516, 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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Abstract

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: 24 Oct 2022 11:21
URI: https://orca.cardiff.ac.uk/id/eprint/47824

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