Uncorrelated universe: Statistical anisotropy and the vanishing angular correlation function in WMAP years 13
Abstract
The largeangle (lowl) correlations of the cosmic microwave background (CMB) as reported by the Wilkinson Microwave Anisotropy Probe (WMAP) after their first year of observations exhibited statistically significant anomalies compared to the predictions of the standard inflationary bigbang model. We suggested then that these implied the presence of a solar system foreground, a systematic correlated with solar system geometry, or both. We reexamine these anomalies for the data from the first three years of WMAP's operation. We show that, despite the identification by the WMAP team of a systematic correlated with the equinoxes and the ecliptic, the anomalies in the firstyear internal linear combination (ILC) map persist in the threeyear ILC map, in allbutone case at similar statistical significance. The threeyear ILC quadrupole and octopole therefore remain inconsistent with statistical isotropythey are correlated with each other (99.6% C.L.), and there are statistically significant correlations with local geometry, especially that of the solar system. The angular twopoint correlation function at scales >60 deg in the regions outside the (kp0) galactic cut, where it is most reliably determined, is approximately zero in all wavebands and is even more discrepant with the bestfit {lambda}CDM inflationary model than in the firstyear data99.97% C.L. formore »
 Authors:
 Department of Physics, Case Western Reserve University, Cleveland, Ohio 441067079 (United States)
 Kavli Institute for Cosmological Physics and Department of Astronomy and Astrophysics, University of Chicago, Chicago, Illinois 60637 (United States)
 Fakultaet fuer Physik, Universitaet Bielefeld, Postfach 100131, 33501 Bielefeld (Germany)
 (United Kingdom)
 Publication Date:
 OSTI Identifier:
 20935209
 Resource Type:
 Journal Article
 Resource Relation:
 Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevD.75.023507; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANGULAR CORRELATION; ANISOTROPY; CORRELATION FUNCTIONS; GEOMETRY; ISOTROPY; MAPS; QUADRUPOLES; RELICT RADIATION; SOLAR SYSTEM; UNIVERSE
Citation Formats
Copi, Craig J., Huterer, Dragan, Schwarz, Dominik J., Starkman, Glenn D., and Beecroft Institute for Particle Astrophysics and Cosmology, Astrophysics, University of Oxford. Uncorrelated universe: Statistical anisotropy and the vanishing angular correlation function in WMAP years 13. United States: N. p., 2007.
Web. doi:10.1103/PHYSREVD.75.023507.
Copi, Craig J., Huterer, Dragan, Schwarz, Dominik J., Starkman, Glenn D., & Beecroft Institute for Particle Astrophysics and Cosmology, Astrophysics, University of Oxford. Uncorrelated universe: Statistical anisotropy and the vanishing angular correlation function in WMAP years 13. United States. doi:10.1103/PHYSREVD.75.023507.
Copi, Craig J., Huterer, Dragan, Schwarz, Dominik J., Starkman, Glenn D., and Beecroft Institute for Particle Astrophysics and Cosmology, Astrophysics, University of Oxford. Mon .
"Uncorrelated universe: Statistical anisotropy and the vanishing angular correlation function in WMAP years 13". United States.
doi:10.1103/PHYSREVD.75.023507.
@article{osti_20935209,
title = {Uncorrelated universe: Statistical anisotropy and the vanishing angular correlation function in WMAP years 13},
author = {Copi, Craig J. and Huterer, Dragan and Schwarz, Dominik J. and Starkman, Glenn D. and Beecroft Institute for Particle Astrophysics and Cosmology, Astrophysics, University of Oxford},
abstractNote = {The largeangle (lowl) correlations of the cosmic microwave background (CMB) as reported by the Wilkinson Microwave Anisotropy Probe (WMAP) after their first year of observations exhibited statistically significant anomalies compared to the predictions of the standard inflationary bigbang model. We suggested then that these implied the presence of a solar system foreground, a systematic correlated with solar system geometry, or both. We reexamine these anomalies for the data from the first three years of WMAP's operation. We show that, despite the identification by the WMAP team of a systematic correlated with the equinoxes and the ecliptic, the anomalies in the firstyear internal linear combination (ILC) map persist in the threeyear ILC map, in allbutone case at similar statistical significance. The threeyear ILC quadrupole and octopole therefore remain inconsistent with statistical isotropythey are correlated with each other (99.6% C.L.), and there are statistically significant correlations with local geometry, especially that of the solar system. The angular twopoint correlation function at scales >60 deg in the regions outside the (kp0) galactic cut, where it is most reliably determined, is approximately zero in all wavebands and is even more discrepant with the bestfit {lambda}CDM inflationary model than in the firstyear data99.97% C.L. for the new ILC map. The fullsky ILC map, on the other hand, has a nonvanishing angular twopoint correlation function, apparently driven by the region inside the cut, but which does not agree better with {lambda}CDM. The role of the newlyidentified lowl systematics is more puzzling than reassuring.},
doi = {10.1103/PHYSREVD.75.023507},
journal = {Physical Review. D, Particles Fields},
number = 2,
volume = 75,
place = {United States},
year = {Mon Jan 15 00:00:00 EST 2007},
month = {Mon Jan 15 00:00:00 EST 2007}
}

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