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BOOMERanG constraints on primordial non-Gaussianity from analytical Minkowski functionals

Natoli, P., De Troia, G., Hikage, Chiaki, Komatsu, E., Migliaccio, M., Ade, Peter A. R., Bock, J. J., Bond, J. R., Borrill, J., Boscaleri, A., Contaldi, C. R., Crill, B. P., De Bernardis, P., De Gasperis, G., De Oliveira-Costa, A., Di Stefano, G., Hivon, E., Kisner, T. S., Jones, W. C., Lange, A. E., Masi, S., Mauskopf, Philip Daniel, MacTavish, C. J., Melchiorri, A., Montroy, T. E., Netterfield, C. B., Pascale, Enzo, Piacentini, F., Polenta, G., Ricciardi, S., Romeo, G., Ruhl, J. E., Tegmark, M., Veneziani, M. and Vittorio, N. 2010. BOOMERanG constraints on primordial non-Gaussianity from analytical Minkowski functionals. Monthly Notices of the Royal Astronomical Society 408 (3) , pp. 1658-1665. 10.1111/j.1365-2966.2010.17228.x

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Abstract

We use Minkowski functionals (MFs) to constrain a primordial non-Gaussian contribution to the cosmic microwave background intensity field as observed in the 150- and 145-GHz BOOMERanG maps from the 1998 and 2003 flights, respectively, performing for the first time a joint analysis of the two data sets. A perturbative expansion of the MF formulae in the limit of a weakly non-Gaussian field yields analytical formulae, derived by Hikage et al., which can be used to constrain the coupling parameter fNL without the need for non-Gaussian simulations. We find −770 < fNL < 500 at 95 per cent CL, significantly improving the previous constraints by De Troia et al. on the BOOMERanG 2003 data set. These are the best fNL limits to date for suborbital probes.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: methods: analytical; methods: statistical; early Universe; cosmic background radiation; cosmology: observations
Additional Information: Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/0035-8711/ (accessed 20/02/2014).
Publisher: Royal Astronomical Society
ISSN: 0035-8711
Date of First Compliant Deposit: 30 March 2016
Last Modified: 04 Jun 2017 03:20
URI: http://orca-mwe.cf.ac.uk/id/eprint/19798

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