Angular-planar CMB power spectrum

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.creatorPereira, Thiago S.-
Autor(es): dc.creatorAbramo, L. Raul-
Data de aceite: dc.date.accessioned2025-08-21T19:15:25Z-
Data de disponibilização: dc.date.available2025-08-21T19:15:25Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2009-09-18-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1103/PhysRevD.80.063525-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/225644-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/225644-
Descrição: dc.descriptionGaussianity and statistical isotropy of the Universe are modern cosmology's minimal set of hypotheses. In this work we introduce a new statistical test to detect observational deviations from this minimal set. By defining the temperature correlation function over the whole celestial sphere, we are able to independently quantify both angular and planar dependence (modulations) of the CMB temperature power spectrum over different slices of this sphere. Given that planar dependence leads to further modulations of the usual angular power spectrum Cℓ, this test can potentially reveal richer structures in the morphology of the primordial temperature field. We have also constructed an unbiased estimator for this angular-planar power spectrum which naturally generalizes the estimator for the usual Cℓs. With the help of a chi-square analysis, we have used this estimator to search for observational deviations of statistical isotropy in WMAP's 5 year release data set (ILC5), where we found only slight anomalies on the angular scales ℓ=7 and ℓ=8. Since this angular-planar statistic is model-independent, it is ideal to employ in searches of statistical anisotropy (e.g., contaminations from the galactic plane) and to characterize non-Gaussianities. © 2009 The American Physical Society.-
Descrição: dc.descriptionInstituto de Física Teórica UNESP-Universidade Estadual Paulista, Caixa Postal 70532-2, 01140-070, São Paulo-
Descrição: dc.descriptionInstituto de Física Universidade de São Paulo, CP 66318, 05314-970, São Paulo-
Descrição: dc.descriptionInstituto de Física Teórica UNESP-Universidade Estadual Paulista, Caixa Postal 70532-2, 01140-070, São Paulo-
Idioma: dc.languageen-
Relação: dc.relationPhysical Review D - Particles, Fields, Gravitation and Cosmology-
???dc.source???: dc.sourceScopus-
Título: dc.titleAngular-planar CMB power spectrum-
Tipo de arquivo: dc.typelivro digital-
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