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Oxford University Press (OUP), Monthly Notices of the Royal Astronomical Society, 3(408), p. 1658-1665

DOI: 10.1111/j.1365-2966.2010.17228.x

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BOOMERanG Constraints on Primordial Non-Gaussianity from Analytical Minkowski Functionals

Journal article published in 2009 by A. de Oliveira-Costa, P.; Dipartimento di Fisica Universita' La Sapienza Roma Italy de Bernardis, G.; Dipartimento di Fisica Universita' di Roma “Tor Vergata” Via della Ricerca Scientifica 1. I.-00133 Roma Italy de Gasperis, P.; Dipartimento di Fisica Universita' di Roma “Tor Vergata” Via della Ricerca Scientifica 1. I.-00133 Roma Italy; INFN Sezione di Tor Vergata Italy Natoli, G.; Dipartimento di Fisica Universita' di Roma “Tor Vergata” Via della Ricerca Scientifica 1. I.-00133 Roma Italy De Troia, C.; Department of Astrophysical Sciences Princeton University Peyton Hall Nj 08544 USA; School of Physics and Astronomy Cardiff CF24 3aa Hikage, E.; Texas Cosmology Center University of Texas at Austin 1. Station C1400 TX 78712 Komatsu, M.; Dipartimento di Fisica Universita' di Roma “Tor Vergata” Via della Ricerca Scientifica 1. I.-00133 Roma Italy Migliaccio, P. A. R.; School of Physics and Astronomy Cardiff University CF24 3aa Ade, J. J.; Jet Propulsion Laboratory Pasadena CA Bock, J. R.; Canadian Institute for Theoretical Astrophysics University of Toronto Ontario Canada Bond, Grazia De Troia, J.; Computational Research Division Lawrence Berkeley National Laboratory CA USA; Space Sciences UC CA Borrill, A.; Ifac-Cnr Firenze Italy Boscaleri, C. R.; Theoretical Physics Group Imperial College London Contaldi and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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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.