Searching for Non Gaussian Signals in the Boomerang 2003 CMB Maps

De Troia, G; Ade P. A., R; 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., J; Kisner T., S; Kunz, M; Jones W., C; Lange A., E; Liguori, Michele; Masi, S; Matarrese, Sabino; Mauskopf P., D; 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; Vittorio, N.

doi:10.1086/524402

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.

Titolo:	Searching for Non Gaussian Signals in the Boomerang 2003 CMB Maps
Autori:	DE TROIA G ADE P. A. R 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. J KISNER T. S KUNZ M JONES W. C LANGE A. E LIGUORI, MICHELE MASI S MATARRESE, SABINO MAUSKOPF P. D 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 VITTORIO N. mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2007
Rivista:	THE ASTROPHYSICAL JOURNAL
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.
Handle:	http://hdl.handle.net/11577/1775028
Appare nelle tipologie:	01.01 - Articolo in rivista

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