De Troia, G. and Ade, P. A. R. and Bock, J. J. and Bond, J. R. and Borrill, J. and Boscaleri, A. and Cabella, P. and Contaldi, C. R. and Crill, B. P. and de Bernardis, P. and De Gasperis, G. and de Oliveira-Costa, A. and Di Stefano, G. and Ferreira, P. G. and Hivon, E. and Jaffe, A. H. and Kisner, T. S. and Kunz, M. and Jones, W. C. and Lange, A. E. and Liguori, M. and Masi, S. and Matarrese, S. and Mauskopf, P. D. and MacTavish, C. J. and Melchiorri, A. and Montroy, T. E. and Natoli, P. and Netterfield, C. B. and Pascale, E. and Piacentini, F. and Pogosyan, D. and Polenta, G. and Prunet, S. and Ricciardi, S. and Romeo, G. and Ruhl, J. E. and Santini, P. and Tegmark, M. and Veneziani, M. and Vittorio, N. (2007) Searching for Non-Gaussian Signals in the BOOMERANG 2003 CMB Maps. Astrophysical Journal Letters, 670 (2). L73-L76. ISSN 0004-637X http://resolver.caltech.edu/CaltechAUTHORS:20091202-122207165
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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 f_(NL) as -300 < f_(NL) < 650 at 68% CL and -800 < f_(NL) < 1050 at 95% CL.
|Additional Information:||© 2007 American Astronomical Society. Print publication: Issue 2 (2007 December 1); received 2007 May 11; accepted for publication 2007 October 15; published 2007 October 29. BOOMERANG was supported by CIAR, CSA, and NERSC in Canada, ASI, University La Sapienza and PNRA in Italy, and NASA and NSF in the US. We thank CASPUR and NERSC/LBL. We acknowledge the use of HEALPix.|
|Subject Keywords:||cosmic microwave background|
|Official Citation:||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. Lange, M. 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, and N. Vittorio 2007 ApJ 670 L73-L76 doi: 10.1086/524402|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Jason Perez|
|Deposited On:||03 Dec 2009 22:33|
|Last Modified:||26 Dec 2012 11:35|
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