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 f$_{NL$ as -300\ltf$_NL$\lt650 at 68\% CL and -800\ltf$_NL$\lt1050 at 95\% CL. }

De Troia, G., Ade, P., Bock, J.J., Bond, J.R., Borrill, J., Boscaleri, A., et al. (2007). Searching for Non-Gaussian Signals in the BOOMERANG 2003 CMB Maps. THE ASTROPHYSICAL JOURNAL LETTERS, 670(2), L73-L76 [10.1086/524402].

Searching for Non-Gaussian Signals in the BOOMERANG 2003 CMB Maps

DE TROIA, GRAZIA;CABELLA, PAOLO;DE GASPERIS, GIANCARLO;NATOLI, PAOLO;VITTORIO, NICOLA
2007

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 f$_{NL$ as -300\ltf$_NL$\lt650 at 68\% CL and -800\ltf$_NL$\lt1050 at 95\% CL. }
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/05 - Astronomia e Astrofisica
English
Con Impact Factor ISI
Cosmology: Cosmic Microwave Background
De Troia, G., Ade, P., Bock, J.J., Bond, J.R., Borrill, J., Boscaleri, A., et al. (2007). Searching for Non-Gaussian Signals in the BOOMERANG 2003 CMB Maps. THE ASTROPHYSICAL JOURNAL LETTERS, 670(2), L73-L76 [10.1086/524402].
DE TROIA, G; Ade, P; Bock, J; Bond, J; Borrill, J; Boscaleri, A; Cabella, P; Contaldi, C; Crill, B; de Bernardis, P; DE GASPERIS, G; de Oliveira Costa, A; Di Stefano, G; Ferreira, P; Hivon, E; Jaffe, A; Kisner, T; Kunz, M; Jones, W; Lange, A; Liguori, M; Masi, S; Matarrese, S; Mauskopf, P; Mactavish, C; Melchiorri, A; Montroy, T; Natoli, P; Netterfield, C; Pascale, E; Piacentini, F; Pogosyan, D; Polenta, G; Prunet, S; Ricciardi, S; Romeo, G; Ruhl, J; Santini, P; Tegmark, M; Veneziani, M; Vittorio, N
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/15863
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