THE TWO- AND THREE-POINT CORRELATION FUNCTIONS OF THE POLARIZED FIVE-YEAR WMAP SKY MAPS

Journal Article · Wed Feb 10 00:00:00 EST 2010 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/710/1/689· OSTI ID:21394499

Gjerloew, E; Eriksen, H K; Lilje, P B ^[1]; Banday, A J ^[2]

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1. Institute of Theoretical Astrophysics, University of Oslo, P.O. Box 1029 Blindern, N-0315 Oslo (Norway)
2. Centre d'Etude Spatiale des Rayonnements 9, av du Colonel Roche, BP 44346 31028 Toulouse Cedex 4 (France)

We present the two- and three-point real space correlation functions of the five-year Wilkinson Microwave Anisotropy Probe (WMAP) sky maps and compare the observed functions to simulated LAMBDACDM concordance model ensembles. In agreement with previously published results, we find that the temperature correlation functions are consistent with expectations. However, the pure polarization correlation functions are acceptable only for the 33 GHz band map; the 41, 61, and 94 GHz band correlation functions all exhibit significant large-scale excess structures. Further, these excess structures very closely match the correlation functions of the two (synchrotron and dust) foreground templates used to correct the WMAP data for galactic contamination, with a cross-correlation statistically significant at the 2sigma-3sigma confidence level. The correlation is slightly stronger with respect to the thermal dust template than with the synchrotron template.

• OSTI ID: 21394499
• Journal Information: Astrophysical Journal, Vol. 710, Issue 1; Other Information: DOI: 10.1088/0004-637X/710/1/689; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANISOTROPY
BACKGROUND RADIATION
CORRELATION FUNCTIONS
COSMOLOGY
DUSTS
GHZ RANGE 01-100
MICROWAVE RADIATION
POLARIZATION
SIMULATION
SYNCHROTRONS
ACCELERATORS
CYCLIC ACCELERATORS
ELECTROMAGNETIC RADIATION
FREQUENCY RANGE
FUNCTIONS
GHZ RANGE
RADIATIONS