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

G. De Troia, P. A.R. Ade, J. J. Bock, J. R. Bond, J. Borrill, A. Boscaleri, P. Cabella, C. R. Contaldi, B. P. Crill, P. De Bernardis, G. De Gasperis, A. De Oliveira-Costa, G. Di Stefano, P. G. Ferreira, E. Hivon, A. H. Jaffe, T. S. Kisner, M. Kunz, W. C. Jones, A. E. LangeM. Liguori, S. Masi, S. Matarrese, P. D. Mauskopf, C. J. MacTavish, A. Melchiorri, T. E. Montroy, P. Natoli, C. B. Netterfield, E. Pascale, F. Piacentini, D. Pogosyan, G. Polenta, S. Prunet, S. Ricciardi, G. Romeo, J. E. Ruhl, P. Santini, M. Tegmark, M. Veneziani, N. Vittorio

Research output: Contribution to journalArticle

17 Scopus citations

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 functional 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 asat fNL as -300 < fNL < 650 at 68% CL and -800 <fNL < 1050 at 95% CL.

Original languageEnglish (US)
Pages (from-to)L73-L76
JournalAstrophysical Journal
Volume670
Issue number2 PART 2
DOIs
StatePublished - 2007

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Cosmic microwave background

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