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

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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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