A model-independent test for scale-dependent non-Gaussianities in the CMB

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dc.creatorRaeth, C.
dc.creatorMorfill, G.
dc.creatorRossmanith, G.
dc.creatorBanday, A. J.
dc.creatorGorski, K. M.
dc.date2008-10-21
dc.date2009-03-18
dc.date.accessioned2026-07-07T12:59:51Z
dc.date.available2026-07-07T12:59:51Z
dc.descriptionWe present a model-independent method to test for scale-dependent non-Gaussianities in combination with scaling indices as test statistics. Therefore, surrogate data sets are generated, in which the power spectrum of the original data is preserved, while the higher order correlations are partly randomised by applying a scale-dependent shuffling procedure to the Fourier phases. We apply this method to the WMAP data of the cosmic microwave background (CMB) and find signatures for non-Gaussianities on large scales. Further tests are required to elucidate the origin of the detected anomalies.
dc.descriptionaccepted for publication in PRL, minor revisions, results unchanged, l(cut)-dependency added
dc.identifierhttps://arxiv.org/abs/0810.3805
dc.identifierhttp://arxiv.org/abs/0810.3805
dc.identifierPhys. Rev. Lett., 102, 131301 (2009)
dc.identifierdoi:10.1103/PhysRevLett.102.131301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/225697
dc.subjectAstrophysics
dc.subjectData Analysis, Statistics and Probability
dc.titleA model-independent test for scale-dependent non-Gaussianities in the CMB
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