Search for Non-Gaussian Signals in the BOOMERANG Maps: Pixel-Space Analysis | Zendy

G. Polenta | Zendy; P. A. R. Ade | Zendy; J. J. Bock | Zendy; J. R. Bond | Zendy; J. Borrill | Zendy; A. Boscaleri | Zendy; Carlo Contaldi | Zendy; B. P. Crill | Zendy; P. de Bernardis | Zendy; G. de Gasperis | Zendy; G. De Troia | Zendy; K. Ganga | Zendy; M. Giacometti | Zendy; E. Hivon | Zendy; V. V. Hristov | Zendy; A. H. Jaffe | Zendy; A. E. Lange | Zendy; S. Masi | Zendy; P. Mauskopf | Zendy; A. Melchiorri | Zendy; T. E. Montroy | Zendy; P. Natoli | Zendy; C. B. Netterfield | Zendy; E. Pascale | Zendy; F. Piacentini | Zendy; D. Pogosyan | Zendy; S. Prunet | Zendy; G. Romeo | Zendy; J. E. Ruhl | Zendy; N. Vittorio | Zendy; A. Zeppilli | Zendy

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Search for Non-Gaussian Signals in the BOOMERANG Maps: Pixel-Space Analysis

Author(s) -

G. Polenta,

P. A. R. Ade,

J. J. Bock,

J. R. Bond,

J. Borrill,

A. Boscaleri,

Carlo Contaldi,

B. P. Crill,

P. de Bernardis,

G. de Gasperis,

G. De Troia,

K. Ganga,

M. Giacometti,

E. Hivon,

V. V. Hristov,

A. H. Jaffe,

A. E. Lange,

S. Masi,

P. Mauskopf,

A. Melchiorri,

T. E. Montroy,

P. Natoli,

C. B. Netterfield,

E. Pascale,

F. Piacentini,

D. Pogosyan,

S. Prunet,

G. Romeo,

J. E. Ruhl,

N. Vittorio,

A. Zeppilli

Publication year - 2002

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/341484

Subject(s) - cosmic microwave background , physics , gaussian , skewness , non gaussianity , kurtosis , cosmic background radiation , astrophysics , sky , anisotropy , statistics , mathematics , optics , quantum mechanics

We search the BOOMERanG maps of the anisotropy of the Cosmic MicrowaveBackground (CMB) for deviations from gaussianity. In this paper we focus onanalysis techniques in pixel-space, and compute skewness, kurtosis andMinkowski functionals for the BOOMERanG maps and for gaussian simulations ofthe CMB sky. We do not find any significant deviation from gaussianity in thehigh galactic latitude section of the 150 GHz map. We do find deviations fromgaussianity at lower latitudes and at 410 GHz, and we ascribe them to Galacticdust contamination. Using non-gaussian simulations of instrumental systematiceffects, of foregrounds, and of sample non-gaussian cosmological models, we setupper limits to the non-gaussian component of the temperature field in theBOOMERanG maps. For fluctuations distributed as a 1 DOF $\chi^2$ mixed to themain gaussian component our upper limits are in the few % range.Comment: changes to reflect version accepted by ApJ Letter

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