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dc.contributor.authorDore, Olivier
dc.contributor.authorHolder, Gilbert P.
dc.contributor.authorLoeb, Abraham
dc.date.accessioned2019-09-24T12:04:46Z
dc.date.issued2004
dc.identifier.citationDore, Olivier, Gilbert P. Holder, and Abraham Loeb. 2004. “The Cosmic Microwave Background Quadrupole in a Polarized Light.” The Astrophysical Journal 612 (1): 81–85. https://doi.org/10.1086/422496.
dc.identifier.issn0004-637X
dc.identifier.issn1538-4357
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41393396*
dc.description.abstractThe low quadrupole of the cosmic microwave background (CMB), measured by the Cosmic Background Explorer ( COBE) and confirmed by the Wilkinson Microwave Anisotropy Probe (WMAP), has generated much discussion recently. We point out that the well-known correlation between temperature and polarization anisotropies of the CMB further constrains the low-multipole anisotropy data. This correlation originates from the fact that the low-multipole polarization signal is sourced by the CMB quadrupole as seen by free electrons during the relatively recent cosmic history. Consequently, the large-angle temperature anisotropy data make restrictive predictions for the large-angle polarization anisotropy, which depend primarily on the optical depth for electron scattering after cosmological recombination, tau. We show that if current cosmological models for the generation of large-angle anisotropy are correct and the COBE/WMAP data are not significantly contaminated by non-CMB signals, then the observed C-l(TE) amplitude on the largest scales is discrepant at the similar to99.8% level with the observed C-l(TT) for the concordant LambdaCDM model with tau 0.10. Using tau = 0.17, the preferred WMAP model-independent value, the discrepancy is at the level of 98.5%.
dc.language.isoen_US
dc.publisherAmerican Astronomical Society
dash.licenseLAA
dc.titleThe Cosmic Microwave Background Quadrupole in a Polarized Light
dc.typeJournal Article
dc.description.versionVersion of Record
dc.relation.journalThe Astrophysical Journal
dash.depositing.authorLoeb, Abraham::9975df1f269ab49c1ad5a328a1ec1476::600
dc.date.available2019-09-24T12:04:46Z
dash.workflow.comments1Science Serial ID 96833
dc.identifier.doi10.1086/422496
dash.source.volume612;1
dash.source.page81-85


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